Isuzu D-Max / Isuzu Rodeo (TFR/TFS). Manual - part 1061

ELECTRICAL-BODY AND CHASSIS  8-1

SECTION 8

ELECTRICAL-BODY AND CHASSIS

TABLE OF CONTENTS

PAGE

General Information  ......................................................................................................... 8-

3

Notes for Working on Electrical Items  ....................................................................... 8-

4

Symbols and Abbreviations ........................................................................................ 8- 10

Symbols  .................................................................................................................. 8- 10

Abbreviations  ......................................................................................................... 8- 11

Parts for Electrical Circuit ........................................................................................... 8- 12

Wiring ...................................................................................................................... 8- 12

Fuse  ........................................................................................................................ 8- 14

Fusible Link  ............................................................................................................ 8- 14

Circuit Breaker  ....................................................................................................... 8- 15

Relay  ....................................................................................................................... 8- 15

Diode  ....................................................................................................................... 8- 16

Connector  ............................................................................................................... 8- 17

Battery ..................................................................................................................... 8- 18

Reading the Circuit Diagram ....................................................................................... 8- 21

Main Data and Specifications .......................................................................................... 8- 23

Bulb Specifications  ..................................................................................................... 8- 23

Relay and Fuse Box Location  ..................................................................................... 8- 25

Relay Location-1 (Relay and Fuse Box)  ..................................................................... 8- 29

Relay Location-2 (HEC Engine Model)  ....................................................................... 8- 30

Relay Location-3 (4J Engine Model) ........................................................................... 8- 31

Relay Location-4 (6VD1 Engine Model) ...................................................................... 8- 32

Fuse and Fusible Link Location (Relay and Fuse Box)  ............................................ 8- 33

Fuse and Circuit Breaker Location (Fuse Box)  ......................................................... 8- 34

Diode Location  ............................................................................................................. 8- 36

Fuse Block Circuit-1  .................................................................................................... 8- 37

Fuse Block Circuit-2  .................................................................................................... 8- 38

Fuse Block Circuit-3  .................................................................................................... 8- 39

INDEX

8-2  ELECTRICAL-BODY AND CHASSIS

PAGE

Reference Table of Fuse, Fusible Link and Circuit Breaker  .................................... 8- 40

Grounding Point ........................................................................................................... 8- 43

Reference Table  ..................................................................................................... 8- 43

Location  .................................................................................................................. 8- 45

Main Cable harness Routing  ........................................................................................... 8- 48

System Repair ................................................................................................................... 8- 60

Start and Charging ....................................................................................................... 8- 60

Engine Control Module (ECM) and Fuel Pump .......................................................... 8- 73

QOS/EGR/QWS  ............................................................................................................ 8- 87

Lighting ......................................................................................................................... 8- 93

Rear Fog Light  ............................................................................................................. 8- 128

HeadLight Leveling ...................................................................................................... 8- 132

Hazard Warning Flasher, Turn Signal Light, Back Up Light,

Horn and Stop Light  .................................................................................................... 8- 136

Dome Light, Spot Light and Warning Buzzer  ............................................................ 8- 167

Windshield Wiper and Washer  ................................................................................... 8- 182

Overdrive Off (A/T)  ....................................................................................................... 8- 202

Transmission Control Module (TCM)  ......................................................................... 8- 205

Meter, Warning Light and Indicator Light  .................................................................. 8- 208

Heater and Air Conditioning  ....................................................................................... 8- 264

Power Door Lock  ......................................................................................................... 8- 276

Power Window  ............................................................................................................. 8- 287

Audio, Clock and Cigarette Lighter  ............................................................................ 8- 309

Power Door Mirror  ....................................................................................................... 8- 317

Rear Defogger  .............................................................................................................. 8- 329

Radiator Level Control Warning System  ................................................................... 8- 338

SRS-Air Bag .................................................................................................................. 8- 340

Seat Heater  ................................................................................................................... 8- 344

Shift On the Fly  ............................................................................................................ 8- 346

Immobilizer.................................................................................................................... 8- 354

Connector List (HEC Engine Model)  ............................................................................... 8- 358

Connector List (6VD1 Engine Model) .............................................................................. 8- 376

Connector List (4J Engine Model) ................................................................................... 8- 397

ELECTRICAL-BODY AND CHASSIS  8-3

GENERAL INFORMATION

The body and chassis electrical system operates on a twelve volt power supply with negative ground polarity.
The main harness consists of the engine harness, the instrument harness, the body harness, and the chassis
harness.
The harnesses use a split corrugated tube to protect the wires from the elements.
Wire size is determined by current flow, circuit length, and voltage drop.
All wires have color-coded insulation.
Wire color-codes are shown in the circuit diagrams.
This makes it easier to trace circuits and to make the proper connections.

Each circuit consists of the following:

1. Power source - The battery and the alternator

2. Wires - To carry electrical current through the circuit

3. Fuses - To protect the circuit against current overload

4. Relays - To protect voltage drop between the battery and the circuit parts and to protect the switch points against

burning

5. Switches - To open and close the circuit

6. Load - Any device, such as a light or motor, which converts the electrical current into useful work

7. Ground - To allow the current to flow back to the power source

8-4  ELECTRICAL-BODY AND CHASSIS

NOTES FOR WORKING ON ELECTRICAL ITEMS

BATTERY CABLE

Disconnecting the Battery Cable
1. All switches should be "OFF" position.

2. Disconnect the battery ground cable.

3. Disconnect the battery positive cable.

CAUTION:
It is important that the battery ground cable be
disconnected first.
Disconnecting the battery positive cable first can result in
a short circuit.

Connecting the Battery Cable

Follow the disconnecting procedure in the reverse order to
connect the battery cables.
CAUTION:
Clean the battery terminal and apply light coat of grease to
prevent terminal corrosion.

CONNECTOR HANDLING

Disconnecting the Connectors

Some connectors have a tang lock to hold the connectors
together during vehicle operation.
Some tang locks are released by pulling them towards you 

1

.

Other tang locks are released by pressing them forward 

2

.

Determine which type of tang lock is on the connector being
handled.

Firmly grasp both sides (male and female) of the connector.
Release the tang lock and carefully pull the two halves of the
connector apart.
Never pull on the wires to separate the connectors.
This will result in wire breakage.