CAT GRADER 14H 7WJ664-UP Electrical System Schematic

ComponentLocation

WireDescription Schematic Location

Machine Location

Schematic Location

Machine Location

 Alarm - Action

B-8

C

Resistor- DefrostMotor 

 A-11

E

101

RD

Bat (+)

500

BR

Wiper - Front (Park)

 Alarm - Backup

F-15

1

Resistor- DefrostMotor 

E-4

E

102

RD

Hd Lmp

501

GN

Wiper - Front (Low)

 Alternator 

D-14

2

Resistor- Panel Lamp Dimmer 

E-9

B

103

RD  AuxCkt

502

OR

5,6

503

Wire Wire Number  Color 

ConnectorNumber  CONN 1 CONN 2 CONN 3 CONN 4 CONN 5 CONN 6 CONN 7 CONN 8 CONN 9 CONN 10 CONN 11 CONN 12 CONN 13 CONN 14 CONN 15 CONN 16 CONN 17a CONN 17b CONN 17c CONN 18 CONN 19 CONN 20 CONN 21 CONN 22 CONN 23 CONN 24 CONN 25 CONN 26a CONN 26b CONN 27a CONN 27b CONN 28 CONN 29 CONN 30 CONN 31 CONN 32 CONN 33 CONN 34 CONN 35 35a Se Secondary Steering CONN 35b CONN 36 CONN 37 CONN 38 CONN 39 CONN 40 CONN 41 CONN 42 CONN 43 CONN 44 CONN 45 CONN 46 CONN 47 CONN 48 CONN 49 CONN 50 CONN 51

Schematic Location C-15 F-14 F-14 B-14 B-14 A-14 A-14 A-14 B-13 B-13 B-13 D-13 D-13 D-13 F-12 B-12 A-10 B-11 A-11 F-11 F-11 D-10 D-10 D-10 D-10 D-10 C-10 C-10 C-10 B-10 A-9 B-9 B-9 E-9 A-9 D-8 D-8 B-8 F-7 F-7 A-6 C-6 C-6 C-6 C-6 E-6 E-6 E-6 C-5 C-5 C-5 F-3 F-3 E-3 E-3 B-3

Description

Wire Wire Number  Color 

Machine Location 4 36 7 8 11 27 26 8 37 37 37 22 37 37 37 10 C C C 28 28 B B 39 39 39 21 33 33 C C 38 38 39 39 39 39 38 20 20 40 17 17 17 17 17 17 17 40 40 40 17 17 42 42 43

Theconnectorsshowninthischartareforharnesstoharne t areforharnesstoharnessconnectors. Connectorsthatjoinaharnesstoacomponentaregenerallylocatedator  nearthe component.See theComponentLocation Chart.

Component

Description Access oryCircuits oryCircuits

PowerCircuits

ConnectorLocation

Wiper - Front (HI)

Batteries-12Volt

C-14

105

RD

BR

Wiper.- Rear (Park)

Breaker- Alternator(60A)

108

RD  AuxCkt RD  Alt Output (+) Term.

504

YL

Wiper-Rear(Low)

109

505

BU

Wiper - Rear (HI)

112

PU

MainPowerRly Output

506

PU

Washer - Front

113

OR

OprMonPanelB+Switched

507

WH

Washer - Rear 

114

RD Warning Horn (Forward) RD  AuxCkt

508

PU

RadioSpeaker-Left

115

509

WH

Radio Speaker - Left (Commom)

116

BR

 AuxCkt

511

BR

RadioSpeaker-Right

118

GY  AuxCkt PK  AuxCkt

512

GN

Radio Speaker - Right (Common)

513

OR  A/C Compressor/Refrigerant Pressure SW

RD

515

119 121

KeySw

Back Alarm To Lamp

GY

BU

 AuxCkt

516

W H  AuxCkt GN  A/C

517

124

521

YL

129

BU

 AuxCkt

522

W H  A/C Clutch To Thermostat SW

130

RD  AuxCkt RD  AuxCkt

537

GN

556

WH

135

BU

570

BU

BladeCushion Sol

136

GN

575

YL

Wiper-Aux (Park)

134

141 144 147

 AuxCkt SecondarySter 

PK

GN

BlowerMotor(HI)

122 123

BU

Blower Motor (Medium) BlowerMotor( Low)  A/C SW To Refrigerant SW Turn Signal SW To Flasfler  Differential Lock

 AuxCkt RD  AuxCkt

576

PK

Wiper-Aux (Low)

577

PU

Wiper-Aux (HI)

RD  AuxCkt

578

BU

Washer-Aux

149

PU

 AuxCkt

584

YL

Wiper SW Jumper 

151

592

BU

DC/DCConverter PowerOutput

152

GN  AuxCkt BU  AuxCkt

GN

CondensorFanRelayToMotors

158

593

BR

 AuxCkt

597

165

YL

 AuxCkt

 A503

169

 A504

GN

Rear Defroster Fan (Low)

 A506

OR

FrontDefroster Fan (HI)

176

PK  AuxCkt RD  AuxCkt OR  AuxCkt

 A507

YL

RearDefroster Fan(HI)

 A513

PK

200

BK

Main Chassis

DC/DCConverter MemoryOutput LightingCircuits

173

Ground Circuits 201

PU  A/C HI Press. Coutout SWTo Low Press. SW PK

C-12

23

D-13

8

Sender- EngineCoolantTemp.

 A-14

24

Breaker- Converter(25A)

F-11

13

Sender-FuelLevel

 A-13

25

Breaker - Headlamp

D-10

B

Solenoid- A/CClutch

 A-13

22

Breaker-LightbarLowBeam

D-10

B

Solenoid- BladeCushion

E-2

30

B-3

29

BussBar 

C-14

Control- SecondarySteering

5

Solenoid- Centershift

E-13

9

Solenoid- Centershift

Converter-24Vto1 t er-24Vto1 2V

F-8

12

Solenoid- DifferentialUnlock

E-14

Converter-24Vto1 t er-24Vto1 2V

F-10

12

Solenoid- EngineShutdown

D-13

22

Converter-24Vto1 t er-24Vto1 2V

F-12

13

Solenoid- ForwardHorn

F-3

10

E-9

B

Solenoid - Park Brake

B-11

10

B-5

C

Solenoid- StartAid

 A-13

25

 A-13

22

Fuses

D-9

B

Suppressor-Arc(A/CClutch e ssor-Arc(A/CClutch)

Fuses

E-10

B

Suppressor- Arc (Diff.Unlock)

Gauge-SystemAirPress.L/S

E-5

A

Switch- A/CRefrigerant

 A-13

22

Gauge-SystemAirPress.A/S

E-5

A

Switch-AirDryer 

F-14

31

GaugeCluster 

F-5

A

Switch-Back-UpAlarm

F-14

4

Ground-Cab

D-5

17

Switch- Beacon

B-5

C

C-13

22

Switch- Beacon

B-10

C

D-6

39

Switch- BladeCushion

B-8

C

C-13

8

Switch- Blower(A/C)

D-6

Ground- Engine Ground- Frame(Front) Ground-Frame(Rear)

17

Switch- Blower(Heater)

Ground- LocalizedStud

F-12

D

Switch -Brake Air 

Ground- Strap

C-12

23

Switch- CentershiftPin

E-5

A

Switch- Defroster(Front) Switch- Defroster(Rear)

Ground-FrameToCab(Front)

Lamp -Diff.Unlock

B-10

3

C

 A-10

C

 A-2

11

B-9

C

 A-5

C

D-6

A

E-5

A

Switch- DifferentialUnlock

E-5

A

Switch- Disconnect

E-4

A

Switch- EngineCoolantTemp. (Monitor)

B-14

24

E-10

B

Switch- EngineCoolantTemp. (StartAid)

 A-14

24

E-6

A

Switch-EngineOilPress.

C-13

32

Motor-Blower 

 A-12

15

Switch-FloodLamps

Motor- Blower(A/C)

B-10

14

Switch-FuelPress.

15

Switch -Head/Tail Lamp

Lamp- HighBeam Indicator  Lamp- MasterAction Lamp- TurnIndicator( Left) Lamp- TurnIndicator( Right) Meter- Service Monitor-Electronic MonitoringSystem (EMS)

B-5 D-9 C-14

C B

D-8

B

B-13

24

Dash Lamp Basic

Motor- Blower(Defrost)

E-4

Dash Lamp Hi

Motor- Blower(Heater)

 A-10

E

Switch- HeadlightDimmer 

PK

RotaryBeacon

Motor- SecondarySteering

F-13

20

Switch-Horn

E-9

B

OR

Stop Lamp

Motor- Starter 

C-13

19

Switch-Hyd.OilTemp.

B-11

33

Turn Lamp - Left

Motor-Washer(FrontLower) o ntLower)

F-6

16

Switch-KeyStart

B-9

C

604

Starter Relay Co il To Neut Start SW Or Key SW

605

YL

OR

Key Start SW To Neut Start SW Or Senso r Module

F-6

606

GY

Turn Lamp - Right

Motor-Washer(FrontUpper) o ntUpper)

YL

MainPowerRelay Coil

608

GN

Flood Lamp - Rear 

Motor-Washer(Rear)

310

PU

Start Aid SW To Start Aid Sol

609

YL

Flood Lamp - Side

Motor-Wiper(FrontLower)

311

WH

Start Aid Sol To Temp SW

611

PU

I-lead Lamp Hi

Motor-Wiper(FrontUpper)

D-4

321

BR

Bckp Alarm Lamp Travel Alarm

614

PU

Park/Tail/Dash/Lamp

Motor-Wiper(Rear)

 A-11

GN

Motors- Condenser 

GY

Warning Horn (Forward)

619

326

RD

Key Start SW C” Term.

629

PK

403

GN  Alternator (R) Term.

727

GN

SecondarySterMotor Relay

404

YL

Opr Mon Hyd Oil Temp

728

BU

SecondarySterCont SW

GY

Monitoring Circuits

Head Lamp Lo  AuxHead LampControl Circuits Cont rol Circuits

F-6 C-4

E-8 D-9

E-8

B

16

Switch-LightBarLowBeam

16

Switch- Neutral/Start

17

Switch -Panel Lamp Dimmer 

E-9

B

17

Switch -Parking Brake Press.

B-11

34

Switch- PrimarySteering

F-10

35

B-11

21

Switch- SecondarySteeringTest

PowerPort-(i2V) t -(i2V)

F-12

41

Switch-StartAidEMSTest

Receptical- Aux.Start

C-14

3

Switch -Stop Lamp

Relay- Condenser 

C-10

21

Switch - Tail Lamp

D-8

Relay-Main

D-14

8

Switch- Thermostat(A/C)

B-11

B-8

B 4

C

E-8

B

 A-2

11 B E

Opr Mon Oil Press. (Low Setting)

E773

YL

Center Shift Sol - Push

Relay- SecondarySteering

F-13

22

Switch-TurnSignal

E-9

B

406

Pu

Opt Mon Coolant Temp

F775

BU

Centershift Solenoid

Relay-Start

D-13

8

Switch-Wiper(FrontLower)

 A-4

C

408

WH

Opr Mon System Air Press.

Resistor- BlowerSwitch(A/C)

B-11

15

Switch-Wiper(FrontUpper)

B-4

C

409

OR

OprMonNeut

 A-11

E

Switch -Wiper (Rear)

 A-4

C

410

WH

Opr Mon Action Alarm

411

PK

OprMon Master 

413

BR

Opr Mon Fuel Press.

405

415 417

GN

OprMon TestSW

GY

PrimarySterSW

YL

OprMon ParkingBrake

OR

Eng Coolant Temp Gauge

419 441 447

PK

FuelLevel Gauge

Resistor- BlowerSwitch(Heater)

MachineLocationsare repeatedforc omponentslocatedclose together.  A= Operator’scompartment(Dash).

7WJ664-UP

B

18

E-14

14H Motor Grader  Electrical System

6

BR

603

StarterRelayNo. 1Output

GN

322

4

Flasher  Fuses

E-14

RENR1427-01  August1997

11

GY

StarterNo.1Sol

WH

306 308

C-3

600

  OperatorMonitorReturn

BU

304 307

Sender- Articulation

601

BK

301

BasicMachineCircuits

Front Defroster Fan (Low)

Component

©1997 Caterpillar   All Rights Reserved

Printed in U.S.A.

B= Operator’scompartment(Steering console). C=Operator'scompartment(Right sideconsole) D= Operator’scompartment(Headliner). E= Operator’scompartment(Under seat).

Harness And Wire Electrical Schematic Symbols