Isuzu KB P190. Manual - part 1235

8A-2  ELECTRICAL-BODY AND CHASSIS 

PAGE 

Fuse Block Circuit (4JJ1-TC/4JK1-TC (RHD)) SOUTH AFRICA ...............................8A-  39 

Fuse Block Circuit (4JJ1-TC/4JK1-TC (RHD)) EXCEPT SOUTH AFRICA  ...............8A-  41 

Fuse Block Circuit (4JJ1-TC/4JK1-TC) - (LHD) G.EXP .............................................8A-  43 

Fuse Block Circuit (4JH1-TC) - (LHD) ........................................................................8A-  45 

Fuse Block Circuit (4JA1T (L)) ...................................................................................8A-  47 

Grounding Point  ..............................................................................................................8A- 49 

Ground Point  ...............................................................................................................8A- 49 

Ground Point Location  ...............................................................................................8A-  89 

Cable Harness Routing  ...................................................................................................8A-  91 

Main Cable Harness (RHD)..........................................................................................8A-  91 

Instrument Harness (RHD) ..........................................................................................8A-  92 

Main Cable Harness (LHD) ..........................................................................................8A-  93 

Instrument Harness (LHD) ..........................................................................................8A-  94 

Engine Harness C24SE ...............................................................................................8A-  95 

Engine Harness 4JJ1-TC/4JK1-TC  ............................................................................8A-  96 

Engine Harness 4JH1-TC/4JA1T (L) ...........................................................................8A-  97 

Transmission Harness  ...............................................................................................8A-  98 

System Repair ..................................................................................................................8A- 100 

Start and Charging ......................................................................................................8A- 100 

Engine Control Module (ECM)  ...................................................................................8A- 111 

Exhaust Gas Recirculation (EGR) & GLOW; 4JA1T (L) Only ...................................8A- 143 

Lighting ........................................................................................................................8A- 149 

Front Fog Light  ...........................................................................................................8A- 180 

Rear Fog Light  ............................................................................................................8A- 190 

Headlight Leveling  ......................................................................................................8A- 194 

Illumination ..................................................................................................................8A- 200 

Hazard Warning Flasher, Turn Signal Light, Backup Light, 

Horn and Stoplight  ....................................................................................................8A- 213 

Dome Light, Spotlight, Map Light and Warning Buzzer  ..........................................8A- 245 

Windshield Wiper and Washer  ..................................................................................8A- 264 

Transmission Control Module (TCM)  ........................................................................8A- 285 

Manual Transmission Shift Assist .............................................................................8A- 298 

Meter, Warning Light and Indicator Light  .................................................................8A- 303 

Heater and Air Conditioning  ......................................................................................8A- 371 

Power Door Lock  ........................................................................................................8A- 386 

ELECTRICAL-BODY AND CHASSIS  8A-3 

PAGE 

Power Window  ............................................................................................................8A- 415 

Audio, Clock and Cigarette Lighter  ...........................................................................8A- 440 

Power Door Mirror  ......................................................................................................8A- 464 

Rear Defogger  .............................................................................................................8A- 480 

Supplemental Restraint System (SRS)-Air Bag ........................................................8A- 491 

Transfer Case Control Module ...................................................................................8A- 498 

Anti-Lock Brake System .............................................................................................8A- 514 

Immobilizer ..................................................................................................................8A- 519 

Keyless Entry  ..............................................................................................................8A- 529 

Data Link Connector ...................................................................................................8A- 553 

Anti Theft ......................................................................................................................8A- 561 

Key Inter Lock  .............................................................................................................8A- 588 

DRM ..............................................................................................................................8A- 592 

Trailer Hitch .................................................................................................................8A- 595 

Power Train Interface Module (PIM)  ..........................................................................8A- 600 

Connector List  .................................................................................................................8A- 606 

 

8A-4  ELECTRICAL-BODY AND CHASSIS 

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: 

5.  Power source – The battery and the alternator 

5.  Wires – To carry electrical current through the circuit 

5.  Fuses – To protect the circuit against current overload 

5.  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 

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

5.  Ground – To allow the current to flow back to the power source 
 

ELECTRICAL-BODY AND CHASSIS  8A-5 

NOTES FOR WORKING ON ELECTRICAL ITEMS 

Battery 

 
 

BATTERY CABLE 

Disconnecting the Battery Cable 
5.  All switches should be “OFF” position. 

5.  Disconnect the battery ground cable. 

5.  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.