Isuzu D-Max / Isuzu Rodeo (TFR/TFS). Manual - part 1380

ELECTRICAL-BODY AND CHASSIS  8-85

TROUBLESHOOTING

STOPLIGHT AND HIGH MOUNTED STOPLIGHT

1. One side of stoplight does not light

Checkpoint

Trouble Cause

Countermeasure

Replace the bulb or repair

connector contact

Burned out bulb or poor

connector contact

NG

Repair open circuit or

connector contact

Repair open circuit or

connector contact

Open circuit or poor connector

contact

LHD:
Continuity between
8 

H-8

 - 2 

T-1

 (LH) (or

2 

T-6

 (RH))

RHD:
Continuity between
18 

H-6

 - 2 

T-1

 (LH) (or

2 

T-6

 (RH))

Open circuit or poor connector

contact

Continuity between

B-34

 - 4 

T-1

 (LH) (or

4 

T-6

 (RH))

NG

NG

OK

OK

Stoplight bulb continuity

2. Both sides of stoplight do not light

Adjust the switch installation

position

Stop light switch (or brake

switch) function

Incorrect the switch installation

or adjustment

NG

Repair open circuit or

connector contact

Voltage between 2 

T-1

ground or 2 

T-6

 - ground

with brake pedal depressed

(Should be battery voltage

present)

Open circuit or poor connector
contact between stoplight
switch (or brake switch) and
stoplight

NG

OK

Reinstall or replace fuse No.

EB-11 (10A)

Fuse No. EB-11 (10A, Fuse

and Relay box)

Poor fuse contact or blown

NG

OK

8-86  ELECTRICAL-BODY AND CHASSIS

3. High mounted stoplight does not light

Checkpoint

Trouble Cause

Countermeasure

Repair or replace the high

mounted stoplight

Continuity between 1 

L-5

 -

1 

L-6

High mounted stoplight

malfunction

NG

Repair an open circuit or

connector contact between

1 

L-5

 - 8 

H-8

Voltage between 1 

L-5

 -

ground with brake pedal

depressed

(Should be battery voltage

present)

Open circuit or poor connector

contact

NG

OK

Repair grounding point

(

B-28

) contact

Grounding point (

B-28

)

Poor grounding point contact

NG

OK

ELECTRICAL-BODY AND CHASSIS  8-87

TURN SIGNAL LIGHT AND HAZARD WARNING LIGHT

1. Turn signal light does not light on both sides (RH and LH)

Checkpoint

Trouble Cause

Countermeasure

Replace the flasher unit

Flasher unit malfunction

NG

Repair or replace the

combination switch

Turn signal switch continuity

between connector

3 

C-42

 - 4 

C-42

 and

3 

C-42

 - 5 

C-42

 when

turn signal switch operates

Short circuit between

connector 1 

C-45

 - 2 

C-45

when turn signal switch

operates with starter switch

in “ON” position (Turn

signal light should be ON)

Poor switch point contact or

faulty switch

NG

OK

Reinstall or replace fuse No.

CB-11 (15A)

Fuse No. CB-11 (15A, Fuse

box)

Poor fuse contact or blown

fuse

NG

OK

OK

Repair open circuit or

connector contact

Continuity between

connector 3 

C-45

 -ground

(Should be continuity)

Open circuit or poor connector

contact

NG

8-88  ELECTRICAL-BODY AND CHASSIS

2. Turn signal light does not light on one side (RH or LH)

Checkpoint

Trouble Cause

Countermeasure

Repair open circuit or

connector contact

Open circuit or poor connector

contact

NG

(LH)

Continuity between

2 

C-25

 - 4 

C-42

 (FRT),

1 

C-1

 - 4 

C-42

 (SIDE)

1 

T-6

 - 4 

C-42

 (RR)

(RH)

Continuity between

2 

C-22

 - 5 

C-42

 (FRT),

1 

C-1

 - 5 

C-42

 (SIDE)

1 

T-6

 - 5 

C-42

 (RR)

Repair or replace the

combination switch

Turn signal switch continuity

Poor switch point contact or

faulty switch

NG

OK

OK

Repair open circuit or

connector contact

Open circuit or poor connector

contact

NG

3. Hazard warning light does not light

Repair or replace the hazard

SW.

Hazard SW. malfunction

NG

Voltage between 2 

B-16

 -

ground (Should be battery

voltage present)

Hazard SW. continuity

Reinstall or replace the fuse

No. EB-1 (15A)

Fuse No. EB-1 (15A, Relay

and fuse box)

Poor fuse contact or blown

fuse

NG

OK

OK

Repair open circuit or

connector contact

Open circuit or poor
connector contact between
fuse No. EB-1 (15A) -
2 

B-16

NG

4. Flashing rate too fast (One side)

Replace the bulb or repair

open circuit

Inspect bulb

Burned out bulb

NG