Isuzu D-Max / Isuzu Rodeo (TFR/TFS). Manual - part 1194

8-116  ELECTRICAL-BODY AND CHASSIS 

7.  Passing light does not function when dimmer switch is operated 
 

Checkpoint  

Trouble 

Cause 

 

Countermeasure 

 

Repair or replace the dimmer
switch

Dimmer switch

Poor switch point contact

NG

Repair open circuit between
4 

X-1

 - 14 

C-42

Voltage between
14 

C-42

 - ground (Should

be battery voltage present)

Open circuit

NG

OK

 

 
 
8.  Headlight beam does not change when dimmer switch is operated 
 

Repair or replace the dimmer
switch

Dimmer switch

Loose beam lever or foreign
material in switch

NG

 

 
 

ELECTRICAL-BODY AND CHASSIS  8-117 

TAIL LIGHT, LICENSE PLATE LIGHT, CLEARANCE LIGHT AND ILLUMINATION 

CONTROLLER 

 
1.  All lights do not light 
 

Checkpoint  

Trouble 

Cause 

 

Countermeasure 

 

Repair or replace the
combination switch

Lighting switch continuity
between connector
8 

C-42

 - 7 

C-42

Poor switch point or connector
contact

NG

Reinstall or replace the tail
relay

Tail relay

Poor relay contact or relay
faulty

NG

OK

Reinstall or replace the fuse
No. EB-12

Fuse No. EB-12 (15A, Relay
and fuse box)

Poor fuse contact or blown

NG

OK

 

 
 
2.  Tail light does not light 
 

Replace the bulb or repair
connector contact

Tail light bulb continuity

Bulb burned out or poor
connector contact

NG

Repair open circuit or
connector contact

Continuity between connector
3 

T-6

 - 4 

T-6

 (RH)

or 3 

T-1

 - 4 

T-1

 (LH)

Open circuit or poor connector
contact

NG

OK

 

 
 

8-118  ELECTRICAL-BODY AND CHASSIS 

3.  License plate light does not light 
 

Checkpoint  

Trouble 

Cause 

 

Countermeasure 

 

Repair open circuit or
connector contact

Continuity between
connector 1 

T-3

 - 2 

T-3

Open circuit or poor connector
contact

NG

Replace the bulb or repair
connector contact

License plate light bulb
continuity

Bulb burned out or poor
connector contact

NG

OK

 

 
 
4.  Clearance light does not light 
 

Replace the bulb or repair
connector contact

Clearance light bulb continuity

Bulb burned out or poor
connector contact

NG

 

 
 
5.  Illumination controller does not operate 
 

Repair knob installation or
replace the controller

Turn the illumination controller
knob (Brightness should
change)

Loose knob or faulty controller

NG

Repair short circuit or replace
the wire

Disconnect the illumination
controller connector (Light
should be dim)

Short circuit

NG

OK

 

 

ELECTRICAL-BODY AND CHASSIS  8-119 

 

  REMOVAL AND INSTALLATION 

 

 

 

HEADLIGHT 

Removal 

1.  Remove the radiator grille center bolt. 
 

 

 
 

2.  Use a screwdriver to raise the clip and release the lock. 
  Place a clean rag beneath the screwdriver tip to protect the

body painted surfaces. 

3.  Remove the radiator grille. 
 

 

 
 

4.  Remove the headlight rim. 
 

 

 
 

5.  Disconnect the headlight connector. 
6.  Remove the headlight.