ConnectorLocation
WireDescription Wire Number
W ri e Co ol r
D es cr p it o i n
Wire Number
PowerCircuits
Wire Color
Description
AccessoryCircuits(Continued)
101
RD
Bat (+)
E54 3
WH
102
RD
Roading Lamps
E54
GN
A ux iilar y H y dr a u l i cS ol e n o i d# 1 A ux iilar y H y dr a u l i cS ol e n o i d# 2
105
RD
Key SW
110
RD
Horn/ Misc.
603
PK
Beacon Switch
111
RD
Signal Lamp
6 04
OR
LightingCircuits R ea rS o t p/ Ta li /T ur nL am p
11 3
OR
O pe ar ot rM on ti or ni g
T ur nS gi n a lS wi ct h( LH )
ConnectorNumber
Volume 2
A-14
-
CONN 1 CONN 2
E-15
CONN 3 CONN 4
C-14,I-14 C-14
-
57
I-6
59NA,60COS 57
CONN 5
I-12,I-13
-
62
CONN 6
I-12,I-13
-
62
60 5
YL
Power Port
60 6
GY
T ur nS gi n a lS wi ct h( RH )
B R
R e a rFl od Sw ti h c
607
PK
Fr o nt F olod Sw Sw ti h c
117
Y L
R e a rFl od Sw ti h c
608
G N
118
GY
Front Wi Wiper
6 10
OR
Fo r nt R oa di ng L am pS wi tc h
119
PK
Rear Wiper
611
PU
High Beam Lamp
122
BU
HVAC Relay
614
PU
Backlighting
CONN13
123
WH
Transmission
617
BR
LH Tail Lamp
CONN14
I-10
128
PK
YL
RH Tail Lamp
115
RD
116
R e ar Floo dSw ti ch
34
CONN7
G-12,G-13
CONN 8
A-11,D-11,B-15
-
64 63
D-11 F-9
A-2
A
CONN 11
F-9
I-12,C-14
A
F-9
D-10,A-8,F-6
E-7
-
D
-
63
A
B u ck e t Pos tioi n
618
CONN 15
F-10
131
RD
Start Aid
619
GN
Low Beam Lamp
CONN 16
F-10
-
A
134
YL
Ride Control
620
WH
Fr o nt Flood Lam p
CONN 17
F-9
E-11
A
136
G N
Rear Fog Lamp
CONN18
A l l Wh el St e ir n g
627
YL
143
BR
All Wheel Drive
630
G Y
144
GY
Beacon
Y L
F or nt Fl Fl od Sw Sw ti ch
R e ar F olo dLam p ControlCircuits
I-14
Function
Actuate
3E-6449
Hydrauli a ulicTemperature(446DOnly)
7N-0758
Hydrauli a ulic Temperature
7W-1238
Engi ne OilPressure
7X-8549
Hyd. Filter Pressure (446DOnly)
9W-1519
CoolantTempe r ature(446DOnly) ratu
128-5091
AllWhe e lSteer Pressure elStee u re
C ols e d
38 ± 3º C
27º ± 3°C
Normally
( 1 00. 4± 5 . 4º F)
( 8 0. 6º ± 5. 4 ° F) 6 21. t o 9 5 . 1k P a ( 9t o1 3 . 8p is )
Normally
1 10 t o1 38 k P a
8 6t o 10 3k Pa
Normally
(16 t o20 ps )i
LoaderCylind e rPressure er
134-0404
Hydrauli a ulicFilterPressure s ure
235-1790
Cold Start Temp e rature erat
I-7,I-8
-
CONN 19
D-8
E-1 2,E - 1 ,3B 7- , B - 8F, - 7 , F 8-
A
I-4
G-3
18
A
194-2553
FloatDetentPilotPressure u re
A - C, N o r m al yl Col s e d
(50 7 . 6p s)i
(43 5 . 1± 21 . 8p si )
A-B , No r ma ll y O p e n
27 6 t o3 0 3 k Pa
2 07 k Pa (30 psi)
Open
37 to 4 3°C
Normally
(99 ot 10 9 °F )
C ol se d
2 20 0k Pa M a x
18 0 0± 1 75 k Pa
N or ma ll y
(319 psi)
(261 ±25.4 psi)
Closed
275 to 1750 kPa¹
702
O R
Br a k eSw ti ch ( B )
CONN21
H-4
F-3
18
F or nt Fl Fl od Sw Sw ti ch
710
GN
Speed Sensor
CONN 22
G-4
-
D
720
PU
Br a k eSw ti ch ( A )
CONN 23
G-4
-
D
236-6923 Refri gerantPressure(A\C) -(40 to 255 psi) ¹ With increasing pressure the closed condition can be maintained up to 2800 kpa (405 psi), with decreasing pressure the closed d ow n o t 1 70 k pa ( 25psi).
163
WH
A u x. Hyd ar u li s c
752
YL
Fo w r ard Sol e noi d
CONN 24
F-4
-
D
²Contactpositionatthe contactsoftheharnessconnector.
170
R D
R adio/ Dome L a mp
754
BU
R e ve sr eS o le n oi d
CONN 25
H-4
I-1
10 25
-
10
-
25
18 0
RD
184
B U
A ri S us p e ns oi nS e at
7 55
OR
S pe ed C ul tc hS ol en oi d# 3
R ear H d yr a u il s c
76 2
YL
H yd ar ul ci F ol wR wR el ay
CONN 26 CONN 27
I-2 I-4
GroundCircuits
7 66
GN
Ta r ns mi ss o i nN eu tr al S wi ct h
CONN 28
E-2,E-1
77 9
WH
Qu i ck Co Co up el rS o l en o id
CONN 29
F-1
45
F MI No.
202
BK
A u t o s h if tCo Cont or l
C 70 1
YL
Au t os h i tf C on rt ol
CONN 30
-
H-3
D
0
Data valid but above normaloperatio n alran nalran g e. ge.
BK
A ux . Hy Hy dr a u il cs C on rt o l
C 72 0
BU
Ta r ns mi ss o i nN eu tr al L oc kS w ti ch
CONN 31
-
B 1-5, B - 1 4, G -10
A
1
Data va l id but belownorm lid aloperatio a tionalran g e. ge.
2 18
BK
S hi tf H an dl e Co nt ro l S ( EE N OT E AK )
E701
PK
Rid e Con t r ol A u o t S wi t ch
CONN 32
-
D-14,A-3
A
2
Data e r rati rrati c, intermittent, or ncor i rect. r ect. Volta g e abovenorm ge alor shorted hig h. h.
BK
Main Chassis
C-2
2 65
BK
S hi tf H an dl e Co nt ro l S ( EE N OT E AK )
E702
Rid eC o nrt o l En a b l eS wtic h
CONN 33
E-10
A
281
BK
A u t o s h if tCo Cont or l
E764
OR
A W S Ci r cl e S e t e r So l e n oi d
CONN 34
-
B-12
D
4
Volta g ebelo ge w normalor shorte wnorma h orte d ow. l
A250
BK
MSSControl
F738
WH
L oa de r P r e ssu r e S wtic h
CONN 35
-
I-12,A-3
A
5
Curre n t belowno nt r maloropencircu rmalor i t. it.
BasicMachineCircuits
OR
F739
GN
3 0 1
B U
S at r et r N o . 1 Sol
F748
WH
Rid e C on t or l O nS wtic h
3 04
WH
S ta tr er Re al yN o. 1O ut pu t
F765
BR
Transmis s ionin GearRelay sion
3 0 6
GN
S at r et r Re Rel a y Co Coil
F793
OR
Dea dEng ineL o w er S w ti c h
A ri I nel t H e ate r R el a y
3 0 7
OR
K e y St a r tS wit ch
G703
GN
DeadEngine Lower Comma n d Relay nd
3 08
YL
M ai nP o w er Re al yC oi l
G726
GY
AllWhe e lSteer S elStee hutoff Solenoid
3 09
GY
A tl er na o t r( D) T er m.
G789
BR
AllWhe e lSteer Mo elStee de S de elect Switch
3 10
PU
S ta tr Ai dS W To St ar tA di Re al y
G795
OR
AllWhe e lSteer Mo elStee de S de elect Switch
3 21
BR
H yd a r ul ci T e m pe a r tu e r Sw ti ch
G796
YL
AllWhe e lSteer Mo elStee de S de elect Switch
3 22
GY
W ar ni ng H o r nF ( or wa dr )
H730
BR
S pe e d Cl uct h S ol e n o i d #2
3 26
PU
E ng ni eS hu dt ow nR el ay
H731
GY
S pe e d Cl uct h S ol e n o i d #1
3 27
PK
F ue lL fi tP um pR el a y
H767
BR
AllWhe e lSteer Mo elStee de S de elect Switch
338
PK
367
MSS Control
H768
BR
B U
R e a rH o r nSw ti ch
H769
BR
382
PK
S at r t A i dS o le n oid
H770
BR
384
BU
Glow Plug Re Relay
H771
BR
S di e S hi f t L o c k S ol e n o di
A313
OR
Stabilizer Le g Alarm
H772
YL
Hydrauli a ulic Shutoff Sole n oid noid
AllWhe e lSteer RHSteerSole elStee n oid noid AllWhe e lSteer LHSteer Sole elStee n oid noid AllWhe e lSteer S elStee hutoff Solenoid
CONN 36
-
CONN 37
F-2
CONN 38
E-12,E-13
H-11 H-11
18
6
Curre n t abo nt v e nor ve malor gr ound e d circuit ed c uit.
18
7
Mechanic a lsyste alsyste m not respon p onding prope r ly. rly.
17
8
Abno r malfre rmalfre q uen quen c y, pulse width, or peri cy, od.
17
9
A bn or ma l up da e t .
-
A-3
CONN 39
-
F-8,A-3
CONN 40
-
A-12
17
CONN 41
-
A-2
CONN 42
-
10
Abn orm a l r at e o f c h a ng e .
A
11
Failure m odenotiden t ifiable. tifia
A
12
B a d de vci e o r c om po ne n.t
CONN 43
-
B-2
A
13
O u to f a c lbi r a t i on .
CONN 44
-
G-10
A
CONN 45
-
H-10
10
CONN 46
-
CONN 47 CONN 48
-
B-3
I-10
D
H-9,H-6
D A 48 42
CONN 49
-
F-10,F-11 H-9
CONN 50
C-9
F-11
CONN 51 CONN 52
-
H-9
D
G-7
48
CONN 53
-
BU
MSSControl
M733
PK
MSS Control
CONN 54
G-6
A347
GN
MSSEng Relay MonitoringCircuits
A856
OR
Stabilizer L eg Timer eg
CONN 55
-
E-8,H-4
C 88 3
GY
A WS Qu Qu ci k Co u p el rR el ay
CONN 56
-
A-7,G-6
D
40 5
GY
L ow O l i Pr Pr es su er L am p
C 88 4
OR
R gi ht B r oo mA ng el R el ay
CONN 57
-
B-6
42
4 06
PU
Hg i hC oo al nt T em pe a r u t e r La mp
C 88 5
PK
A WS Qu Qu ci k Co Co u p el r Re al y
CONN 58
-
C-6
56
CONN 59
-
D-6
A346
41 9
H-7 G-7
YL
P ar ki ng B ar ke L a mp
E 80 3
YL
Le f t Br oo mA ng el R e l ay
YL
A ll Wh Wh ee lS et er Po Po sG au g e
E 80 4
BU
R gi ht B o r om A ng el R el ay
CONN 60
-
H-3
18
D ri yt A ri Fi tl er L a mp
F 8 4 6
PU
MSS LE DI DI n di a c ot r
CONN 61
-
G-5
42
4 39
YL
F ul l Wa e t rS ep ar at or L am p
F 87 1
A ll W he el S e t er L H S et er S oel no di
CONN 62
22
-
F-1
4 41
OR
E ng C oo al nt T em pe a r tu e r G au ge
F 87 2
BU
A ll W he el S e t er R H St ee r So el no di
CONN 63
-
G-1
7
YL
C on ve tr er Te mp er at ur eG au ge
F 874
PK
St a r tA di T i m er
CONN 64
H-6
F-5
24
447
PK
F u e L le e vl Ga Gauge
F 87 7
WH
A WS Qu Qu ci kC kC ou pl e r R el ay
CONN 65
-
D-6
42
450
Y L
T a c h om e t e r Ga Gauge
F 87 9
PK
A WS Qu Qu ci k Co u p el r Re al y
CONN 66
-
E-5
D
48 3
BR
L ow Br Br ak eF ul di L am p
G 8 4 8
G N
MSS LE DI DI n di a c ot r
CONN 67
-
B-4
6
E 45 5
BR
H yd a r ul ci T e m p er at ur e Sw ti ch
H 80 9
YL
S at bi i l ze rL e g Ti Ti me r
CONN 68
E-3
-
D
D ri ty Hy dr au il cF li te rL am p
H 83 3
CONN 69
A-15
B-2
64
CONN 70
I-4
H-3
D
CONN 71
-
G-3,G-4
49
PU
C on rt ol F ol wS wS wi ct h
YL
AWD S witch
PK BR
W pi er - F o r n t P ( ar k)
922
BR
Fo w r ard So Sol e noi d
G N
W pie r- Fr Fr o nt (L (Lo w)
923
G Y
R e ve sr eS o le n oi d
502
O R
W pie r- Fr o nt H ( )I
944
O R
C a tD a t aLin k( +)
503
AccessoryCircuits
911
Mod u l e no t r e p son din g.
18
Sen s o rs u p yl f a u lt.
19
C o nd ti i on no tm e.t
424D: RXA1-UP CJZ1-UP
428D: BXC1-UP MBM1-UP DSX1-UP
430D: BNK5900-UP BML4800-UP
432D: WEP1-UP TDR1-UP
442D: TBD1-UP SMJ1-UP
446D: DBL1-UP
Sender: A component that isused with a temperature or pressure gauge. The sender Sender: A measuresthe temperature or pressure. Its resistance changesto give an indication to the gauge of the temperature or pressure.
T
Relay (Magnetic Switch): Arelayis an electricalcomponent thatisactivated byelectricity. It hasa coilthat makes an electromagnet when current flowsthrough it. The electromagnet can open or close the switch part of the relay. Solenoid: Asolenoid isan electrical component that isactivated byelectricity. Ithasa Solenoid: Asolenoid coilthat makesan electromagnet when current flowsthrough it. The electromagnet can open or close a valve or move a piece of metal that can do work. MagneticLatchSolenoid: Amagnetic latch solenoid isan electricalcomponent that is activated byelectricityand held latched by a permanent magnet. Ithastwo coils (latch and unlatch) that make electromagnet when current flowsthrough them. It also hasan internal switch that places the latch coilcircuit open at the time the coil latches.
Harness and Wire Symbols Wi re, Cab l e, or Harness Assembly Identification: Includes HarnessIdentification Letters and Harness Connector Serialization Codes (see sample).
HarnessIdentificationLetter(s): (A, B, C, ..., AA, AB, AC, ...)
AG-C4 111-7898
L-C12 3E-5179
L-C12 3E-5179
1
Part Number: for Connector Plug
PartNumber: for Connector Receptacle
Plug
Receptacle Pin orSocket Number
1 2
Deutschconnector: Typicalrepresen tation tation of a Deutsch connector. The plug contains all socketsandthereceptaclecontainsallpins.
1 2
Sure-Sealconnector: Typicalrepresenta tion tion of a Sure-Sealconnect or. The plug andreceptacle contain both pins and sockets.
Volume 1 of 2: Cab Wiring
Schematic Location
Machine Location
I 1- 3 , -I 1 5
Component
Schematic Location
4
Relay - Main
Alternator
E-1
5
Relay -Pressure Switch Timer
G-13
ArcSuppressor - AllWheelDrive
E-4
24
Relay - Rear Lighting
D -6
B-6
Machine Location B A
Resistor, Senderand Solenoid Specifications
C
W pie r- Re Re a r (P a r )k
945
BR
C a tD a t aLin k( )-
ArcSuppressor - HVAC
H-1
25
Relay - Start
B
Part No.
Y L
W pie r- Re a r L( o w )
96 3
GN
Lo ad e r De et n t S ol en o id
Battery #1
D-4
6
Resistor - Excitation
E-1
D
3E-1908
Solenoid:
Washer -Front
97 3
BR
Au t o/ Ma n u al Sw Sw ti ch
Battery#2
D-4
6
Resistor - Motor Speed
H-9
15
3E-8620
Solenoid:
507
WH
Washer - Rear
9 75
WH
Ta r ns mi ss oi ni nG ea rR el ay
Block-LightingDiode
D-12
A
Send e r -C o nv e r et r Temper a t ure
F 1-
12
3E-8622
Solenoid:
B-6
Component Description
3.5 ± .15
BucketPosition
21. 8 ±1
SideShiftLock AllWheelSteer Shutoff
10.5 ± .3
PU
R ad oi S p e ak e r - L ef t
976
O R
R die C ont or l Re Rel a y
Block- Fuse Relay #1
B-6
B
Sender - Coolant Te Temperature
H 1-
13
WH
R ad oi Sp ea ke r- Le ft ( Co mm on )
977
YL
Aut o/ M anu a l Sw ti ch
Block- Fuse Relay #2
D-6
C
Sender - Fuel Level
G-1
11
3T-9493
Solenoid:
51
BR
R ad oi Sp e a ke r- Ri gh t
A922
OR
AuxiliaryHydraul ic Control
Breaker - Roading Lamps
F-6
D
Solenoid - A/ C Clut ch
I-1
25
4W-9972
Sender:
Control-ShuttleHandle
H-6
24
Solenoid - Bucket Position
F-2
17
Converter Temperature CoolantTemperature(446DOnly)
Sender:
FuelLevel(446DOnly)
R ad oi S p e ak er - R gi ht ( Co mm on )
A972
OR
Ride ControlRelay
C 92 0
GY
D ai gn o s it cI nd ci at or
515
G Y
B olw er Mot o r (H )I
G 94 3
BU
A ux liai y r H yd a r ul ci C on rt ol
B ol we rM ot or (M (M e d ui m)
G 98 1
51 6 517
GN
PU
ComponentIdentifiers(CID¹) ModuleIdentifier (MID² ) AutoshiftTransmissionControlSystem (MIDNo. 081)
S at bi il ze r L e gA al m r
B U
B olw er Mo Mot o r( L ow )
L990
G N
52 1
YL
AC / SW SW T oR ef ir ge ar n t SW
L9 8
OR
Le f t Br oo mA ng el R e l ay
CID
5 22
WH
H ea te /r A/ C SW T oT he m r os ta tS W
L 99 9
GN
R gi ht B r oo mA ng el Re al y
0168
537
GN
Hazard Switch
M 96 8
BU
Q ui ck C ou pl er P ni S wi tc h
St a r tA di Ti m er
0191
Spee dSensor(Transm a nsm issionOutpu t) t) P a ar me t er F a ul t
Component Electrica t rica l SystemVoltage lSystem
552
WH
AWD Swit ch
M 96 9
YL
R di eC on rt ol Sw Sw ti ch
0 26 8
5 68
GN
T ra ns mi ss oi ni nG ea rR el ay
N 90 4
PU
F or wa dr H g i h So el n o di
0 34 6
R i de C o nt r ol R eal y
569
PK
A/C S hutoff Tachometer
OR
F ow r a dr Lo w S ol e n oid
0 36 7
R i deC o nrt o l Sw i ct h
578 585
N905 N907
GN
Ree v r se S oel n o id
0368
Transmission s ionAuto/ManualSwitch
AW DS DSw ti h c
0520
TheConfiguratio a tionoftheTransmission
Auxi liary Hydrau d rau l icControl lic
0621
Inval id DownshiftSwitch
Washer ATT Switch
YL
Auxiliary Hydraulic Control
N945
O R
Quick Coupler Pin Swit ch
N997
WH
R912
OR
B ac k ho e S h uto f f S wtic h
0641
Transmission s ionSol enoi d1(ForwardHig h) h)
YL
M SS E xc ti er C oi l
0642
Transmission s ionSol enoi d2(Reverse )
PK
M SS E xc ti er C oi l
0643
Transmission s ionSol enoi d3(ForwardLow)
Fue l L itf Pu mp Re l a y
0644
TransmissionSolenoid4 (Sp eed Clu eed tch 1) tch
BR WH
A/C Shutoff Jumper
C 56 8
WH
H gi hS pe e d R el ay t oB ol we rM ot or
T 90 1
E5 28
PU
H ea et /r A/ C SW T oBl ow erS pe pe e dS wi wi ct h
T 90 2
E529
YL
Blow er Speed Switch
X977
YL
E 54 0
PK
A ux liai y r H yd a r ul ci C on rt ol
0645
TransmissionSolenoid5 (Sp eed Clu eed tch 2) tch
0646
TransmissionSolenoid6 (Sp eed Clu eed tch 3) tch
0650
The Plug or f theHarness Co de de
0668
Transmission s ionCon t rol(Sh trol(Sh i ftLever ift )
0 68 3
R eal y I(n Ge ar )
1180
Auxiliary Hydrau l ic Solenoid #1 lic
1181
Auxiliary Hydrau l ic Solenoid #2 lic
1184
AuxiliaryHydraul icSolenoidSupp ly ly
1 18 7
C o nt i nu ou s Fol w S wi t ch
1189
AuxiliaryProportion t ionalLeve rSwitch Quick CouplerSwitch Quick Couple r Soleno id id
Shift Handle Control (MIDNo. 117)
80 17 62
Electrica t rica l SystemVoltage lSystem Transmission s ionCon t rol(Sh trol(Sh i ftLever ift )
Machine Security System Control (MIDNo. 124)
20
36
22 18
8
10
97
3 29 41 D 56 2 86 85 19 53 12 76 7 64 15 83 45 47 38 89 96 30 1 90 63 84 6 42 C B A 57
1
13 75 5
26
2
47 41
59
E-2
20
Solenoid -Cold Start Advance
F-1
31
G-9
A
Sol e noi d- For war dT ar ns m is sion
I 1-
18
Gauge - Converter Temperature
F-13
A
Solenoid - Front Drive
Gauge - Coolant Temperature
F-13
A
Solenoid -Fuel Shutoff
46
91
87 15 17 80 60
4
30 32
85 B
56
82 62
83
22 18 19
13
89 52
5 45 12
36 11
6
97 75 26
7 90
LHLock Valve RHLock Valve ForwardHigh Speed Clutch #2
7.9 ± .5
121-4036
Solenoid:
FrontDrive Speed Clutch #1
10.5 ± .3
10
129-4531
Solenoid:
D
130-0912
Solenoid:
Forward Low Speed Clutch #3
7.9 ± .5
160-7203
Solenoid:
AllWheelSteer Circle Steer ing AllWheelSteer LHSteering AllWheelSteer RHSteering
8.15 ± .6
E-14
A
Sol e noi d- Re Rev e r e s Tr Tran m s si is o n
I 1-
18
H-13
93
I-3
F-1
5
Solenoid - S ide Shift L ock
87
Switch -Air Filter Pressure
Ground - Engine
D-1
12
Switch - All Wheel Drive
F-2
Ground - Engine
D-3
89
Switch -Atch Front Flood
D-4
90
Switch - Atch Rear Flood
D-13
A
Ground - Right Cab 1
F-7
A
S wi tc h - B ac kh oe H an dl e Pu sh bu t on
I -1 3, I 1- 4
85
Ground - Right Cab 2
F-7
A
S wi ct h- Ba ck h o eH yd ar u l ci Sh ut of f
D1 - 5
A
Ground - Top of Cab
C-13
Group-BasicLamp
G-15
Group-FaultLamp
F-15
Group - Function Lamp
D-13
91
Ground - Frame
1
Switch - Beacon
E-13
A
Switch - Blower Speed
H-10
A
Switch - Brake A
D
Switch - Brake B
H-6
A
A
171-8775
Solenoid:
22
1 79 5 - 59 3
S ol en oi d:
22
185-4254
Solenoid:
A
PilotHydraulicShutoff RideControl
29
Switch - Brake Fluid Level
I-3
10
I-1
5
Sw ti h c - C old St a r tT e m p er a t u r e
F 1-
5
Horn - Forward
G-1
26
Switch - Coolant Temperature
H 1-
3
Horn - Rear
I-15
4
Switch - Engine Oil Pressure
H-1
20
203-3055
Solenoid:
Pilot Shutoff
D
210-5544
Solenoid:
Quick Coupler
Jumper - A/CShutoff
I-8
A
Switch - Front Horn
Lamp - Left Headlight
H-3
95
Switch - Front Roading Lamps
96
Switch - Hazard
24
S wi ct h- H ea et r/ A ri C on di it on ni g
G-3 D-2 I-3
D-3 F-2 E-3 H1 - 0
Resistor:
Alternator Excitation
S en d e :r
C oo al n t T em p e ar ut er
32
2 4 3- 1 06
G 2-
22
H-8
30
Switch - Key Start
10
Switch - Loader Neutralizer
H-3
Motor - Rear Wiper
C-15
E-14 C 9-
A
7.9 ± .5
R everse
7. 9 ± .5 120 ± 6 54°C(130°F) - 560 to 716 110°C(230°F) - 72 to 82
¹ Atroomtemperatureunlessotherwisenoted.
85
8
Switch - Park Brake
Motor - Starter
D-2
7
Switch - Rear Horn
D-14
Power Port
G-9
14
Switch - Rear Washer / Wiper
E-14
A
Relay - A/C Shutoff
I-8
A
Switch -Refrigerant Pressure
I-1
25
42
D6 -
E-15
A
G -7
24
A
Related Electrical Service Manuals Title
Form Number
C
Switch - Side Shift Lock
D-6
C
Switch - Stalk
Electrica t rica l SystemVoltage lSystem
Relay - Aux Lighting
B -6
B
Switch - Start Aid
E-13
A
A-14
B
Switch - Std Front Flood
F-11
A
Autoshift Contro l: l:
RENR2869
F-11
A
Aux HydraulicControl:
I-7
97
RENR3588
49
48
R el ay -A l l W h ee l D ir ve Br a k ni g
C -8
ForwardTransmissio n ReverseTransmissio n
Solenoid:
G1 -
Sw ti h c - H ydr a ul ci Te Temp e r a t u r e
Relay - Attachment
0 24 8
C at D at a Li nk
Relay - Aux Flood
0817
ECMInternalBa n alBackupBatte ry ry
Relay - Cab
C-6
C
Switch - Std Rear Flood
1 39 1
M S S Ou t pu t D ir v e rNo.1
Relay - Front Lighting
A -6
B
Switch - Thermostat
1 39 2
M S S Ou t pu t D ir v e rNo.2
Machine Harness Connector and Component Locations
Relay - Fuel Lift Pump
E-2
20
Switch - Transmission Neut ar l
E-5
56
¹ The CID is a diagnostic code that indicate s which circuit is faulty.
Relay - Glow Plugs
F-1
18
S wi ct h- T a r n s mi s oi nN eu rt al Lo ck
G3 -
D
²TheMID isadiagnosticcodethatindicateswhichelectroniccontrolmodule diagnosed the fault.
Relay - High Speed
H-9
A
Switch -Water Separator
G -1
36
Relay - HVAC
C-6
C
Machine locations are repeated for components located close together. A= Located inside/o n right console. B =Locatedin machineelectricalcenter1. C= Locatedinmachineelectricalcenter2. D= Locatedinside/o nfrontconsole.
28 - 33
3. 2 ± .2
Solenoid:
S wi ct h- H yd ar u l ci F l ie t rP er s ur e
20
2.2 ± .2
240 - 250 10. 16 ± .2
238-1966
A
2
E-1
10.5 ± .3
Full: Empty:
238-9397
Switch - Heater Vent
C-12
Motor - FuelLift Pump
10.5 ± .5
FuelLevel
223-8181
D A
10
Motor - Front Wiper
Motor -Rear Washer Pump
H-7
3
Sender:
10.5 ±.3
Auxiliary Hyd raulic #1 raulic Auxiliary Hyd raulic #2 raulic
G-9
187-8936
5.0 ± .3
H yd ar ul ci S hu to f
E-4
Group - Air Suspension Seat
H-6
22 ± 1.1
All Wheel Steer Lock Valve
Heater - Engine Block
Motor - HVACBlower
25 20
C 42
84 93
86 24 53 76
38
57 A 29 63
81
Alternator Excitation (446D Only)
91
Motor - Front Washer Pump
96
10
Resistor:
92
I1 - 3
D-4
28 - 40 240 - 260
Solenoid:
H-13
GlowPlugs
110°C(230°F) - 72 to 82 Full: Empty:
Solenoid:
H-13
So l en o i d- Pi ol tH yd ar ul ci sS hu ot ff
8C-4110
1.5 54°C(130°F) - 560 to 716
8C-5541
Solenoid - Hydraulic Shutoff Solenoid -Pilot Shutoff
A
Ground - Cab
6T-0454
S tart Aid St
117-2911
19 20
A A
I-8
Meter-Service 95 D
E-1
F-12 F-12
Gauge-TachometerwithA/CShutoff
Lamp - Right Headlight 64
G-1
Gauge-FuelLevel Gauge - Tachometer Gauge - Voltmeter
25
60
8
Component
0168 0668
0168
24
3
1529 1530
48
46
81
AuxiliaryHydraulicControl (MIDNo. 106)
CID
82
93 4
11 95
91
BU
586 C511
52 49
32
87
Diode - FuelLift Pump Flasher
Resistance (Ohms)¹
A/C Clut ch
50 8 5 09
A/CCo m per s so rR / erf i ge r a n tP r es s u r eS W
Wire Gauge Wire Color
Component Location (Volume 1) Component Alarm - Backu p
The connectors shown in this chart are for harness to harness connectors. Connectors that join a harness to a component are generally located at or near the component. See the Component Location Chart.
PU
GN
Component Part Number
Printed in U.S.A.
B R
OR
9X-1123
Harnessidentificationcode: Thisexample indicates wire group 325, wire 135 in harness "AG".
© 2012 Caterpillar AllRights Reserved
506
5 12
5A Fuse (5 Amps)
325-AG135 PK-14
504
5 13
Harness ConnectorSerialization Code: The "C" stands for "Connector" and the number indicates which connector in the harness(C1, C2, C3, ...).
2
20 P a ar me t er f ai l u r e s. ¹The FMI is a diagnostic code that indicates what type of failure has occurred.
42
4 43
501
Parameter notavailabl e.
17
420D: BKC920-UP BMC1060-UP BLN10300-UP F DP 18 40 0- UP
D
BU
50
16
416D: B2D1-UP BGJ1050-UP BFP12900-UP C XP 94 0- UP
D
42 9
G 42 3
P a ar me t er f ai l u r e s. P a ar me t er f ai l u r e s.
Reed Switch: Aswitch Switch: Aswitch whose contactsare controlled bya magnet. Amagnet closes the contactsof a normallyopen reed switch; it opensthe contacts of a normallyclosed reed switch.
416D, 420D, 424D, 428D, 430D, 432D, 442D, and 446D Backhoe Loader Electrical System
48
43 0
PU
14 15
Ground (Case): Thisindicates that the component doesnot have a wire connected to ground. It isgrounded bybeing fastened to the machine.
Normally Open²
F ai ul re Des cr pi ito n
3
Ground(Wired): Thisindicates that the component is connected to a grounded wire. The grounded wire isfastened to the machine.
condition can be maintained
Failure Mode Identifiers (FMI)¹
20 3
200
Switch (Normally Closed): Aswitch that willopen at a specified point (temp, press, etc.). No circle indicatesthat the wire cannot be disconnected from the component.
Normally
47 to 5 3°C
A ri I n l e t H eat e r
Switch (Normally Open): Aswitch that willclose at a s pecified point (temp, press, etc.). The circle indicatesthat the component hasscrew terminalsand a wire can be disconnected from it.
AB - ,N or ma l l yO pe n
( 1 7t o1 2 7°F )
B R
CircuitBreaker Symbol
Flow Symbol
O p e n AC - ,N or ma ll yC o l se d
( 50 ± 3p si )
P U
Level Symbol
Fuse: A component in an electricalcircuit that willopen the c ircuit if too much current flows Fuse: A through it.
Normally
3 44 ±2 0k Pa 3 00 0± 15 0k P a
158
Temperature Symbol
Symbols and Definitions
O p e n
98ºC M IN ( 2 0 8 . 4 º FMI N)
( 80 p is )
160
157
O p e n
3 5 0 kP aM ax
(40 to 44 psi)
T
Pressure Symbol
C ols e d
( 1 2. 5t o15 p is )
107 ± 3ºC 5 51 kP aM ax
131-9203
Normally
6 21. t o 9 5 . 1k P a ( 9t o1 3 . 8p is )
( 24. 6± 5. 4º F)
Symbols
Contact Position
27ºC MIN ( 8 0 6. º FMI N)
A
CONN 20
Deactuate
38 ± 3 ºC ( 1 00. 4± 5 . 4º F)
63
I-6
CONN 9 CONN 10 CONN12
Part No.
Harness And Wire Electrical Schematic Symbols
RENR7781-03 April2012
Off Machine Switch Specification Machine Location
SchematicLocation Volume 1
Eel crt i cS t ar tni gM ot o :r 4 46 DO DO nl y:
143 -05 39
S E NR 3 8 28
1 11 9- 8 60
S EN R3 8 28
Machine Security:
RENR2462
ShiftHandleControl:
RENR2869
2 f ) o s e c 1 h n i 4 L 2 x s e O h V i 9 c n 3 3 : s n 0 - i o s 1 e n m 8 i ( 7 D , e 7 g a P R 0 2 N E R
WireDescription ConnectorLocation Machine Location
SchematicLocation
ConnectorNumber Volume 1
Volume 2
A-14
-
CONN 1
34
W ri e Co ol r
Wire Number
W ri e Co or l
Sensor - Bucket P osition
C-1
16
101
RD
Bat (+)
E54 3
WH
A u xilai r yH y dr a u l i cS oel no i d# 1
Alternator
G-1
5
Se n s o r - R RSt e ir n g P o s tion i
A 1- 0
82
102
RD
Roading Lamps
E54
GN
A u xilai r yH y dr a u l i cS oel no i d# 2
Antenna
I-4
1
Sensor - Speed
C-8
18
105
RD
Key SW
D es cr pi it on PowerCircuits
D es cr p i ito n
AccessoryCircuits(Continued)
CONN 2
E-15
-
57
CONN 3
C-14,I-14
-
59NA,60COS
110
RD
Horn/Misc.
603
PK
111
RD
Signal L amp
6 04
OR
R ea rS o t p/ Ta li /T ur nL am p
1 13
OR
O pe ar ot rM on ti or ni g
60 5
YL
T ur nS gi na lS wi ct h( LH )
115
RD
Power Port
60 6
GY
T ur nS gi na lS wi ct h( RH ) F or nt Fl od Sw ti h c
CONN 4
C-14
I-6
57
I-12,I-13
-
62
CONN 6
I-12,I-13
-
62
CONN 7
G -12,G-13
-
63
CONN 8
A-11,D-11,B-15
-
64
CONN 9
D-11
CONN 5
CONN 10
I-6
F-9
CONN 11
A-2
63 A
1 1 6 1 1 7 118 119
B R Y L
Lighting Circuits Beacon Swit h c
R e a rF ood l Sw ti h c
607
PK
R e a rF ood l Sw ti h c
608
G N
GY
Front Wiper
6 10
OR
PK
Rear Wiper
611
PU
High Beam Lamp
BU
HVAC Relay
614
PU
Backlighting
Transmission
617
BR
LH Tail Lamp
B u ck e tP o s tion i
618
YL
RH Tail Lamp
F-9
I-12,C-14
A
CONN 12
F-9
D-10,A-8,F-6
A
122
CONN 13
E-7
-
D
123
WH
R ear Flood Sw ti ch F ro nt Ro ad ni gL am pS wi tc h
I-10
-
63
1 2 8
PK
CONN 15
F-10
I-14
A
131
RD
Start Aid
619
GN
Low Beam Lamp
CONN 16
F-10
-
A
134
YL
Ride Control
620
WH
F or nt Fl od Lamp
A
1 3 6
A
CONN 14
CONN 17
F-9
CONN 18
I-7,I-8
-
CONN 19
D-8
E-12,E-13,B-7,B-8,F-7,F-8
E-11
CONN 20
GN
A l l Whe e l St er ng i
627
YL
Rear Fog Lamp
143
BR
All Wheel Drive
630
G Y
R ear F ood l Lam p
A
144
GY
Beacon
I-4
G-3
18
1 5 7
Y L
F or nt Fl od Sw ti ch
702
O R
B ar ke Sw ti h c (B )
CONN 21
H-4
F-3
18
1 5 8
B R
F or nt Fl od Sw ti ch
710
GN
Speed Sensor
CONN 22
G-4
-
D
CONN 23
G-4
-
D
CONN 24
F-4
-
D
CONN 25
H-4
-
10
CONN 26
I-2
I-1
25
CONN 27
I-4
-
10
ControlCircuits
1 6 0
P U
A ri I n l e tH e a er t
720
PU
B ar ke Sw ti h c (A )
1 6 3
W H
A u x. Hydr a u il s c
752
YL
F o r war dSol e noi d
1 7 0
R D
R a d o/i Dome L a mp
754
BU
R ever se Solen o id
1 80
RD
A ri S us p e ns oi nS ea t
7 55
1 8 4
B U
R e a rH ydr a ul ci s GroundCircuits
OR
S pe ed C ul tc hS ol en oi d# 3
76 2
YL
H yd ar u l ci F ol w Re al y
7 66
GN
T ra ns mi ss oi nN eu tr al S wi ct h
77 9
WH
Schematic Location
Component Alarm - Stabi lizer Leg
Machine Location
E-12
Arc Suppre ssor - Dead EngLower # 1
B-7
Arc Suppre ssor - Ride Contro l
G-4
Schematic Location
Component
A
A
S oel n o i d- A l l Wh ee l Set e rC i cr l eS t ee rni g
A
B - 10
Machine Location
S ol en oi d- A ll W he el S e t er L H St ee ir ng
A1 - 0
80
Assembly - Di ode #1 (AWSAxle)
B-11
80
S ol en oi d- A ll W he el S e t er L oc kV al ve
B1 - 0
80
A-11
80
S ol en oi d- A ll W he el S e t er RH S e t er ni g
A1 - 0
80
Assembly - Di ode #3 (AWSAxle)
A-11
80
S ol e n oi d- A ll W h ee l St ee rS h uo t ff
A 1- 0
80
D-14
Battery #1
A
Solenoid - Aux Hydraulic #1
G-12
42
6
Solenoid - Aux Hydraulic #2
G-12
42
6
Solenoid -Bucket Position
E-1
17
A
Solenoid - Engine Shutdown
H-1
20
Solenoid - Forward High
C-7
18
Solenoid - Forward Low
B-7
18
D-1
Battery #2
D-1
Coil - MSS Exciter
F-13
Control - Autoshift Control -Aux Hydraulics Control -Machine S ecurity C on rt ol - Pl iot H yd a r ulci L o a de r Ha nd el Control - Shift Handle
C-4
6
H-15
A
E-15
A
Solenoid - Front Drive
G -1 3
38
F-7
I-1
S ol e n oi d- Le tf S at b i il ze rL eg De et nt
E 1- 0
24
Solenoid - LH L ock Valve
B-4
36
D-5
6
Solenoid - Loader Detent
I-13
83
E-1 2
A
Solenoid -Quick Coupler
H-9
48
D
S oel n o i d- R e ve r se
E-2
Diode - Autoshift #2
D-5 E-9
Gage - All Wheel Steer Pos
D-7
18
Solenoid - RH L ock Valve
B-4
45
A
Solenoid - Ride Control
G-3
49
6
C-11
D
S ol en oi d- R d i eC on rt ol # 1( EA ME O nl y)
G3 -
49
Ground - Engine
F-1
12
S ol en oi d- R d i eC on rt ol # 2( EA ME O nl y)
G3 -
49
Ground - Engine
F-1
89
S ol en oi d- R g i ht St ab lizi er L e gD et en t
E1 - 0
A
Ground - Frame
G-1
90
Solenoid - Speed Clutch #1
B-8
18
Group - Lamp (AIH/St a rt Aid)
E-2
D
Solenoid - Speed Clutch #2
C-8
18
5
Solenoid - Speed Clutch #3
C-8
18
CONN 28
E-2,E-1
-
25
CONN 29
F-1
C-2
45
CONN 30
-
H-3
D
2 0 2
BK
A u t o s h if t Cont or l
C 70 1
YL
A ut os hi tf C on rt ol
Horn - Forward
E-1
26
Solenoid - Start Aid
E-1
75
2 03
BK
A ux . Hy d r au il cs C on rt ol
C 72 0
BU
T ra ns mi ss oi nN e u t ra l Lo ck S wi tc h
Jumper - Dead Eng Lower
A-6
D
Sw ti ch -446 Eng ne i Oi P l er s u r e
H 1-
20
2 18
Jumper - Start Aid
B-15,B-14,G-10
A
CONN 32
CONN 31
-
D-14,A-3
A
CONN 33
E-10
-
E-12,E-13
A
200
BK
Main C h assis
Q ui ck C ou pl erS ol en o id
Heater - Air Inlet
S wi ct h- Al lW he el St ee rM od eS el e ct
B 1- 1
D
41
S wi ct h- A ll Wh e lS e t e r P er s ur e
C1 - 4
84
C-11
A
Switch - Auto Manual
E-4
D
D-4
6
Sw ti ch - Au ot Sh fi tR de i C o nt or l
H 4-
D
LED - MSS Indicator
D-13
A
Switch - Brake Fluid Level
H-3
10
M ot or - F ro nt W pi er
I -4
2
Switch - Bucket Position
E-1
76
T ra ns mi ss oi ni nG ea rR el ay
M ot or - R ea rW pi er
I -6
8
S wi ct h- Co n to r lF ol w Q ( ui ck Co up el )r
H7 -
D
7
Sw tch i - Coolant Temperature
2
BK
S hi tf H an dl eC on tr ol ( SE E NO TE A K)
E 70 1
PK
Rd i eC on rt ol A ut oS wi tc h
2 65
BK
S hi tf H an dl eC on tr ol ( SE E NO TE A K)
E 70 2
OR
Rd i eC on rt ol E na bl eS wi tc h
Lamp - Dome
CONN 34
-
B-12
D
2 8 1
BK
A u t o s h if t Cont or l
E 76 4
OR
A WS C ri cl eS e t er S ol en oi d
Lamp - Steering Indicator
CONN 35
-
I-12,A-3
A
A250
BK
MSSControl
F 73 8
WH
L oa de rP re s ur eS wi ct h
LED - Diagnostic
BasicMachineCircuits
F 73 9
GN
D ea dE ng ni eL ow er S w ti ch
3 0 1
B U
F 74 8
WH
R di e Co n to r lO n S w ti ch
CONN 36
-
H-11
18
CONN 37
F-2
H-11
18
CONN 38
-
A-3
17
3 04
WH
CONN 39
3 0 6
GN
3 0 7
-
F-8,A-3
17
CONN 40
-
A-12
17
CONN 41
-
A-2
A
CONN 42
-
B-3
A
CONN 43
-
B-2
CONN 44
-
G-10
A
CONN 45
-
H-10
10
CONN 46
-
I-10
D
A
S ar t er t N o . 1 Sol S ta tr er Re al yN o. 1O ut pu t
F 76 5
BR
F-2
H-1
5
I-6
G -1
S ar t er t Rel a y Coil
F 79 3
OR
A ri I nl e t H ea et rR el ay
M ot or - S ta tr er
OR
K e y S ar t tS wit ch
G70 3
GN
D e ad E n g i n eL o we rC o m man d R eal y
Radio
Switch - Dead Eng Lower
A-5
D
3 08
YL
M ai nP ow er Re al yC oi l
G 72 6
GY
A ll W he el S e t erS h ut of fS ol en oi d
Relay - Lef tBoom Angle Relay
G-9
A
S wi ct h- D ua lF un ctoi nR di eC on rt ol
A4 -
D
3 09
GY
A tl er na o t r( D) Te m r .
G 78 9
BR
A ll W he el S e t erM o d eS e el ctS w ti ch
Relay - MSS Eng
D-13
A
Switch - EAME Ride Control
H-4
D
3 10
PU
OR
A l l Wh e e l S t ee rM od eS el e ct S wtic h
Relay - Ride Control
A
Switch - Float Detent Limit
A-4
3 21
YL
A ll W he el S e t er M od e Se el ct S w ti ch
Relay - Air Inlet Heater
D
S wi ct h- Fl o a tD et en tP li ot Pr es su er
A4 -
I-4
F-5
H-1
3
32
S ta tr Ai dS W To St ar tA di Re al y
G79 5
BR
H yd a r ulci T e m pe a r tu e r Sw ti ch
G 79 6
3 22
GY
W ar ni ng H o r nF ( or wa dr )
H 73 0
BR
S pe ed Cl ut ch So el no di # 2
Relay - All Wheel Steer QC
B-14
A
S wi ct h- H yd ar ulci F liet rP er s u re
F 1-
32
3 26
PU
E ng ni eS hu dt o w nR el ay
H 73 1
GY
S pe ed Cl ut ch So el no di # 1
R e la y- Dea dEn gLow er C omma n d
A- 8
A
Sw ti ch - H ydra u li cTe m per a t ure
F 1-
22
PK
F ue lL fi tP um pR el a y
H 76 7
BR
A ll W he el S e t erM o d eS e el ctS w ti ch
Relay - Dead Eng Lower Enable
B-8
A
Switch - Key Start
B-1
MSS Control
H 76 8
BR
A ll W he el S e t er R H S et er S ol en oi d
D
S wi ct h- Le tf S a t biil ze rL e g Up
CONN 47
-
H-9,H-6
D
CONN 48
-
F-10,F-11
A
3 27
F-2
32
A
CONN 49
-
H-9
48
338
PK
Relay - Engine Shutdown
E-2
F 1- 0, F- 12
A
CONN 50
C-9
F-11
42
3 6 7
B U
R e a rH orn Sw ti ch
H 76 9
BR
A ll W he el S e t er L H St ee r So el no di
Relay - Left Steering
A-15
A
Switch - L oader P ressure
F-3
52
CONN 51
-
H-9
D
3 8 2
PK
S ar t tA i dS o len o id
H 77 0
BR
A ll W he el S e t erS h ut of fS ol en oi d
R e lay - Q u ic kC o upl e rI n t erl o c k
G 9-
A
Switch - Quick Coupler Pin
I-9
D
384
BU
Glow Plug Relay
S di eS hi tf Lo ck So el no di
Switch - Rear Fog Lamp
CONN 52
-
Relay - Right Boom Angle
G-9
A
48
A313
OR
Stabilizer L eg Alarm
YL
H yd a r ulci S hu o t f S ol en oi d
Relay - Right Steering
A-14
A
Switch - Rear Steering
D
A346
BU
MSSControl
M733
PK
MSS Control
Relay - Xmsn In Gear
E-8
A
Switch - Return to Dig
D
A347
GN
MSSEng Relay MonitoringCircuits
A856
OR
Stabilizer Le g Timer
Relay- Hydraulic Flow
I-14
A
S wi ct h- R gi ht St ab lizi er L eg U p
A WS Q ui ck C ou pl er R el ay
D
Sw tch i -Standard Ride Control
G-7
-
E-8,H-4 A-7,G-6
CONN 56
-
CONN 57
-
B-6
42
CONN 58
-
C-6
56
D
CONN 59
-
D-6
42
CONN 60
-
H-3
18
CONN 61
-
G-5
42
-
F-1
CONN 63
-
G-1
7
CONN 64
H-6
F-5
24
D-6
42
CONN 65
-
CONN 66
-
CONN 67
E-5
-
BR
48
H-7
G-6
CONN 55
CONN 62
H 77 1
G-7
CONN 53 CONN 54
B-4
22
D 6
H 77 2
C 88 3
GY
R e si ts or - A tl ern a t o r Ex cit a t on i
E- 2
4 05
GY
L ow Oi l P r es su er L am p
C 88 4
OR
Rg i ht Br oo mA ng el R el ay
Send e r -C onv e r er t Te m per a t ure
H 1-
12
Switch - Turn Signal
PU
Hg i hC oo al nt T em pe a r tu e r La mp
C 88 5
PK
A WS Q u i ck C ou p l erR el ay
Sender -C olant Temperature
I-1
13
Switch - Washer
4 1 9
Y L
P a r ik n g Bra e k Lamp
E 80 3
YL
L ef t Br oo mA ng el R e l ay
Sender - Fuel Level
I-1
11
Timer - Leg Stabilizer
E-9
4 29
YL
A ll Wh ee S l e t e rPo s Ga ug e
E 80 4
BU
Rg i ht B r oo mA ng el R el ay
Timer - Start Aid
E-2
4 30
BU
D ri yt A ri Fitl er L a mp
F 8 4 6
PU
M S S LED Indi a ct or
Machine locations are repeated for components located close together.
4 39
YL
F ul lW at erS ep a r at or L am p
F 87 1
PU
A ll W he el S e t er L H St ee r So el no di
A= Located inside /on right console.
4 41
OR
E ng C o al nt T em pe a r tu e r Ga u ge
F 87 2
BU
A ll W he el S e t er R H St ee r So el no di
B =Locatedinmachineelectricalcenter1.
YL
C on ve tr er Te mp er at ur eG au ge
F 8 7 4
PK
F 87 7
4 43 4 4 7 4 5 0
S ar t tA di T mer i
C= Locatedinmachineelectrica lcenter2.
PK
F u el Lev e l Gauge
WH
A WS Q ui ck C ou pl er R el ay
D= Locatedinside/onfrontconsole.
Y L
T a c h om e t e r Gauge
F 87 9
PK
A WS Qu ci k Co u p el r Re al y
L ow Br ak eF ul di L am p
G 8 4 8
G N
M S S LED Indi a ct or
YL
Sa t b i il ze rL e g Ti me r
PU
C on rt ol Fl ow S wict h
-
D
4 83
BR
CONN 69
A-15
B-2
64
E 45 5
BR
H yd a r ulci T e m p er at ur e Sw ti ch
H 80 9
I-4
H-3
D
G 42 3
PK
D ri ty Hy dr au il cF li te rL am p
H 83 3
CONN 71
-
G-3,G-4
49
911
YL
AWD S witch
E-3
The connectors shown in this chart are for harnessto harness connectors. Connectors that join a harness to a component are generally located at or near the component. See the Component Location Chart.
ComponentIdentifiers(CID¹) Module Identifier (MID²) AutoshiftTransmissionControlSystem (MIDNo. 081) CID
Component
AccessoryCircuits 500
BR
501
GN
502
OR
503
Wiper - Front (Park)
922
Wiper - Front L( ow)
923
Wiper - Front (HI)
944
BR GY OR BR
Cat Data Link (-)
963
GN
Loader Detent Solenoid
Washer - Front
973
BR
Auto/Manual Switch
507
WH
Washer - Rear
975
WH
Transmission in Gear Relay
508
PU
Radio Speaker - Left
976
OR
Ride Control Relay
5 0 9
W H
R a d oi S p ea e kr - Lef t( Commo n )
977
YL
Aut o / Manu a l Sw ti ch
511
BR
Radio Speaker -Right
A922
OR
Auxiliary Hydraulic Control
5 1 2
GN
R a d oi S p ea e kr -R ght i C ( o m m on)
A9 7 2
O R
R de i Cont or l Rela y
5 13
OR
A /C C om pr es so /r Re rf gi er an tP e r ss ur eS W
C 92 0
GY
515
GY
Blower Motor H ( I)
G943
BU
Auxiliary Hydraulic Control
516
GN
Blower Motor (Medium)
G981
PU
Stabilizer Leg Alarm
517
BU
Blower Motor (Low)
L990
GN
Start Aid Timer
Electrica l System Voltage
521
YL
Spee dSensor(Transm issionOutp u t)
5 2
W H
P aar m e t e r Fa utl
034 6
A/C SW To Ref igerant r SW
L998
H e a er t A/ / CSW To T h er m os at t S W
L999
G N
GN
Transmission in Gear Relay
N904
PU
Forward High Solenoid
569
PK
A/C ShutoffT achometer
N905
OR
ForwardL o w Solenoid
0520
TheConfigura tionoftheTransmission
578
BU
Washer ATT Switch
N907
GN
Reverse Solenoid
0621
InvalidDownsh iftSwitc h
585
YL
Auxiliary Hydraulic Control
N945
OR
AWD Switch
5 8 6
B R
Q u ic kC o up er l Pi nS wit ch
N 97
WH
A u x l iar i yH d y ar u li cC ont or l
C511
WH
C 568
W H
Transmiss ionSoleno i d1(ForwardHigh) Transmiss ionSoleno i d2(Reverse ) Transmiss ionSoleno i d3(ForwardLow)
0644
Transmissio n So lenoid4 (Sp eed Clutch1)
0645
Transmissio n So lenoid5 (Sp eed Clutch2)
0646
Transmissio n So lenoid6 (Sp eed Clutch3)
0650
The Plug or f the Harn e ss Code
0668
Transmiss ion Control(Shift Le v er)
068 3
R eal y( I nG e a r)
BU YL
R912
H gh i Speed Rela yt oBl o w e r Mo or t
T 9 0 1
YL
T 90 2
PK
M SS Ex ci e t rC oi l
X977
YL
Fuel Lift Pump Relay
PU
H ea e t /r A/ C SW To B ol we rS pe e d S wi ct h
YL
Blower Speed Switch
E 54 0
PK
A ux liai y r H yd a r ulci C on tr ol
OR
82
24 8 80 17 62
81
Auxiliary Hydraulic Soleno i d #2 AuxiliaryHydraulicSolenoidSupply
1187
Conti nuou s FlowSwi tch
1189
AuxiliaryProportion a lLeve rSwitch
152 9
Q uci kC o up l e rS w i ct h
1530
Quick Couple r Soleno id
Shift Handle Control (MIDNo. 117) CID
10
97
420D: BKC920-UP BMC1060-UP BLN10300-UP FDP18400-UP
424D: RXA1-UP CJZ1-UP
428D: BXC1-UP MBM1-UP DSX1-UP
430D: BNK5900-UP BML4800-UP
432D: WEP1-UP TDR1-UP
442D: TBD1-UP SMJ1-UP
446D: DBL1-UP
75
Component
57
81
Fa li ur eD escr p i it on Data va l id but above n o rmalopera t ionalrang e.
1
Data va lid b u t bel ownormaloper ationalran g e.
2
Data e r rati c, intermi ttent, or in c orre ct.
3
Voltage a b ovenormalor shorted hig h.
4
Voltagebelo w normalor sh orted low.
5
Curre n t belo w normalor opencircu it.
6
Curre n t abo v e normalor g r ounded circuit.
Transmiss ion Control(Shift Le v er)
7
Mech a nica lsystem not respon d ing p r operly.
8
Abno r malfre q uen c y, pulse wi dth, or period.
9
A bn or ma l up da te .
0168
Electrica l System Voltage
10
Abn orm a l r ate o f ch a n g e.
024 8
C a tD aat L i n k
11
Failuremodenot dent i ifiable.
0817
ECMInter nalBack upBatte ry
12
Badd e vci e o r co mp o n e n.t
139 1
M S S Ou t pu t D ir v e rNo.1
13
O u to fc ailbr aito n .
M S S Ou t pu t D ir v e rNo.2
14
P aar m e t e rf aliuer s .
¹ The CIDis a diagnostic code that indica tes which circuit is faulty.
15
P aar m e t e rf aliuer s .
²TheMID isadiagnosticcodethatindicateswhichelectroniccontrolmodule diagnosed the fault.
16
P aar m e t e rn ota v alia b le.
17
M od uel n o t r es p o n dni g .
18
Sen s o rs u p l yf a u lt.
19
Con d iito nn o tm et .
20
P aar m e t e rf aliuer s .
¹TheFMIis adiagnosticcodethatindicateswhattypeof failurehasoccurred.
MagneticLatchSolenoid: Amagnetic latch solenoid isan electricalcomponent that is activated byelectricityand held latched by a permanent magnet. Ithastwo coils (latch and unlatch) that make electromagnet when current flowsthrough them. It also hasan internal switch that places the latch coilcircuit open at the time the coil latches.
Wi re, Cab l e, or Harness Assembly Identification: Includes HarnessIdentification Letters and Harness Connector Serialization Codes (see sample).
HarnessIdentificationLetter(s): (A, B, C, ..., AA, AB, AC, ...)
L-C12 3E-5179
L-C12 3E-5179
1
Harness ConnectorSerialization Code: The "C" stands for "Connector" and the number indicates which connector in the harness(C1, C2, C3, ...).
PartNumber: for Connector Receptacle
2 Plug
26 A D D
Receptacle Pin orSocket Number
1 2
Deutschconnector: Typicalrepresen tation of a Deutsch connector. The plug contains all socketsandthereceptaclecontainsallpins.
1 2
Sure-Sealconnector: Typicalrepresenta tion of a Sure-Sealconnect or. The plug andreceptacle contain both pins and sockets.
5A Component Part Number
9X-1123
Fuse (5 Amps)
325-AG135 PK-14
D A
Volume 2 of 2: Chassis Wiring
Function
3E-6 4 49
Hydra ulicTemperature(446DOnly)
7N-07 58
Hydra ulic Temp e rature
7W-1238
Engi ne OilPressure
7X-8549
Hyd. Filter Pressure (446DOnly)
Actuate 38 ± 3ºC ( 1 00. 4± 5 . 4º F )
9W-1519
CoolantTempe r ature(446DOnly)
128-5 091
AllWhe e lSteer Press u re
131-9 203
LoaderCylin d erPress u re
134-0 404
Hydra ulicFilterPress ure
173-7 527
Cold Start Temp e rature
194-2 553
Floa tDetentPilo tPressure
236-6 923
Refri gerantPressu r e(A\C)
D e ac tu a e t 27ºC M IN ( 8 0. 6º FMI N)
Harnessidentificationcode: Thisexample indicates wire group 325, wire 135 in harness "AG".
Wire Gauge Wire Color
Printed in U.S.A.
C o nt ac t P os ti i on Normally C os l e d
38 ± 3ºC
27º ±3°C
( 1 00. 4± 5. 4º F )
( 8 0. 6 º ± 5 . 4 ° F)
O p en
6 21. t o 9 5 . 1k P a
6 21. t o 9 5 . 1k P a
Normally
( 9t o1 3 . 8ps )i
( 9t o1 3 . 8ps )i
C os l e d
1 10 to 13 8k Pa ( 1 6 t o20 psi )
8 6t o1 03 kP a (1 2 . 5t o15 p is )
Normally
Normally
Normally
O p en
107 ± 3ºC
98ºC M IN
( 24. 6± 5. 4º F )
( 2 08 4º . FMI N)
O p en
5 51 kP aM ax
3 44 ±2 0k Pa
A -C ,N or ma ll yC o l se d
( 80 p is )
26
( 50 ± 3 p si )
AB - ,N or ma l l yO pe n
3 5 0 kP aM ax
3 00 0± 15 0k P a
A - C, N o rma l l yC l os e d
( 50 76. p s)i
(43 5 . 1± 21 . 8p si )
A - B, No r ma ll y O pe n
2 76 t o3 0 3 k Pa
2 07 k Pa
(40 to 44 psi)
(30 psi)
Normally
47 to 53°C
37 to 43°C
Normally
(99 to 109°F)
Open
2 20 0k Pa M a x
18 0 0± 1 7 5 k Pa
N or ma ll y
(319 psi)
(261 ±25.4 psi)
275 to 1750 kPa¹
--
(40 to 255 psi)
47 41
46
91
87 15 17 80 60
4
93
82 62
38
D
96
10
86 24 53 76
A 85 29 63 22 B 30 C 45 18 32 36 56 42 19 12 84 11 89 52 83 6 49
25 13
20 5
97 75 26
7 90 48
Related Electrical Service Manuals Title El e ctrci S t a r t ni gM oot r : 44 6DO n yl :
Machine Harness Connector and Component Locations
Autoshift Contro l: Aux Hydrauli c Control:
FormNumber 1 43 - 05 39
S E NR 3 82 8
1 1 9- 86 0
S EN R3 82 8 RENR2869 RENR3588
Machine Security:
RENR2462
ShiftHandleControl:
RENR2869
Resistor, Senderand Solenoid Specifications Part No.
Component Description
3E-1908
Solenoid:
A/C Clutch
3E-8620
Solenoid:
Bucket Position
3E-8622
Solenoid:
Side Shift Lock AllWheelSteer Shutoff
3T-9493
Solenoid:
4W-9972
Sender:
Converter Temperature CoolantTemperature(446DOnly)
6T-0454
Sender:
FuelLevel(446DOnly)
8C-4110
Closed
Resistance (Ohms)¹ 3.5 ± .15 21.8 ±1 10.5 ± .3
Start Aid
1.5 54°C (130°F) - 560 to 716 110°C(230°F) - 72 to 82 Full: Empty:
28 - 40 240 - 260
Resistor:
Alternator Excitation (446D Only)
8C-5541
Solenoid:
LHLock Valve RHLock Valve
117-2911
Solenoid:
ForwardHigh Speed Clutch #2
7.9 ± .5
121-4036
Solenoid:
FrontDrive Speed Clutch #1
10.5 ± .3
129-4531
Solenoid:
Open
(117 to 127°F)
²Contactpositionatthe contactsoftheharnessconnector.
2
95
0
Solenoid: Asolenoid isan electrical component that isactivated byelectricity. Ithasa coilthat makesan electromagnet when current flowsthrough it. The electromagnet can open or close a valve or move a piece of metal that can do work.
AG-C4 111-7898
22 ± 1.1 5.0 ± .3
All Wheel Steer Lock Valve
10.5 ±.3
130-0912
Solenoid:
ForwardLow Speed Clutch #3
160-7203
Solenoid:
AllWheelSteer Circle Steeri ng AllWheelSteer LHSteering AllWheelSteer RHSteering
8.15 ± .6
171-8775
Solenoid:
PilotHydraulicShutoff RideControl
10.5 ± .5
179-5593
Solenoid:
185-4254
Solenoid:
Normally Open²
¹ With increasing pressure the closed condition can be maintained up to 2800 kpa (405 psi), with decreasing pressure the closed condition can be maintained down to 170 kpa (25psi). 1
3
FailureModeIdentifiers(FMI)¹
Relay (Magnetic Switch): Arelayis an electricalcomponent thatisactivated byelectricity. It hasa coilthat makes an electromagnet when current flowsthrough it. The electromagnet can open or close the switch part of the relay.
Part Number: for Connector Plug
Backhoe Shutoff Switch
59
F MI No .
Sender: A component that isused with a temperature or pressure gauge. The sender measuresthe temperature or pressure. Its resistance changesto give an indication to the gauge of the temperature or pressure.
T
Harness and Wire Symbols
13 5
M S S Ex icer t Coi l
8
Electrica l System Voltage
Machine Security System Control (MIDNo. 124)
139 2
25
20
36
3 29 41 D 56 2 86 85 19 53 12 76 7 64 15 83 45 47 38 89 96 30 1 90 63 84 6 42 B C A 57
Auxiliary Hydraulic Soleno i d #1
1181
0668
416D: B2D1-UP BGJ1050-UP BFP12900-UP CXP940-UP
64
1184
0168
Reed Switch: Aswitch whose contactsare controlled bya magnet. Amagnet closes the contactsof a normallyopen reed switch; it opensthe contacts of a normallyclosed reed switch.
416D, 420D, 424D, 428D, 430D, 432D, 442D, and 446D Backhoe Loader Electrical System
60
AuxiliaryHydraulicControl (MIDNo. 106) 1180
Ground (Case): Thisindicates that the component doesnot have a wire connected to ground. It isgrounded bybeing fastened to the machine.
48
95
22 18
93 4
11
46
91
Ride Control Switch
52 49
32
87
Quick Coupler Pin Switch
A/C Shutoff Jumper
E5 28 E529
Ground(Wired): Thisindicates that the component is connected to a grounded wire. The grounded wire isfastened to the machine.
Off Machine Switch Specification
R ght i B or om Ang el R e lay
WH
568
M969
Switch (Normally Closed): Aswitch that willopen at a specified point (temp, press, etc.). No circle indicatesthat the wire cannot be disconnected from the component.
Part No.
Left Broom Angle Relay
GN
552
R i de C o nt r olS wtic h Transmiss ionAuto/Ma n ualSwitch
0643
M968
OR
537
R i de C o ntr olR eal y
036 7
0641
Hazard Switch
Switch (Normally Open): Aswitch that willclose at a s pecified point (temp, press, etc.). The circle indicatesthat the component hasscrew terminalsand a wire can be disconnected from it.
©2012 Caterpillar AllRights Reserved
D ai gn os ti cI nd ci at or
0368
AWD Switch
I-7
Fuse: A component in an electricalcircuit that willopen the c ircuit if too much current flows through it.
Cat Data Link (+)
945
Wiper - Rear (Low)
026 8
G-8
CircuitBreaker Symbol
Flow Symbol
Reverse Solenoid
Wiper - Rear (Park)
YL PU
0168
H-6
Level Symbol
Symbols and Definitions
Forward Solenoid
BR
504 506
0191
0642
A 85
C-1
4 06
CONN 70
CONN 68
B-3 B-14 F1 - 0, F- 12
Temperature Symbol
19
Dio d e- L eg S t ab ii lz er
Diode -Leg Stabilizer Timer
Pressure Symbol
A
Diode - Autoshift #1 Diode - Alternator
Symbols
T
80
Assembly - Di ode #2 (AWSAxle) Assembly - Fe rrite Coil
Harness And Wire Electrical Schematic Symbols
RENR7781-03 April2012
Component Location (Volume 2)
Wire Number
Hydraulic Shutoff
10.5 ± .3
Auxiliary Hyd raulic #1 Auxiliary Hyd raulic #2
187-8936
Sender:
FuelLevel
203-3055
Solenoid:
Pilot Shutoff
210-5544
Solenoid:
Quick Coupler
223-8181
Solenoid:
238-1966
Solenoid:
238-9397
Resistor:
Alternator Excitation
2 4 3- 10 6
S en d e :r
C oo al n t T em p e ar ut er
ForwardTransmissio n ReverseTransmissio n R everse
¹ At room temperature unless otherwise noted.
7.9 ± .5
2.2 ± .2 Full: Empty:
28 - 33 240 - 250 10.16 ± .2 3.2 ± .2 7.9 ± .5 7.9 ± .5 120 ± 6 54°C (130°F) - 560 to 716 110°C(230°F) - 72 to 82
2 f ) o s e c 2 h n i 4 L 2 x s e O h V i 9 c n 3 3 : s n 0 - i o s 1 e n m 8 i ( 7 D , e 7 g a P R 0 2 N E R
