Isuzu N-Series. Manual - part 1122

8-200 CAB AND CHASSIS ELECTRICAL

1-2. Turn Signal Lights Flash Too Quickly

• IS THERE ANY CONTINUITY BETWEEN THE HARNESS

SIDE CONNECTORS 3  B-16  AND  B-7  ?

GROUND IT SECURELY

CONTINUED FROM THE PREVIOUS PAGE

CONTINUED FROM THE PREVIOUS PAGE

• DISCONNECT THE COMBINATION SWITCH

CONNECTOR

• IS THERE ANY CONTINUITY BETWEEN THE SWITCH

CONNECTORS 5  B-70  AND 12  B-70  (WHEN 
TURNING LEFT), 13  B-70  AND 12  B-70  (WHEN
TURNING RIGHT) RESPECTIVELY?

YES

NO

REPAIR A POOR CONNECTION AT THE
CONNECTORS OR AN OPEN CIRCUIT BETWEEN
THE CIRCUIT

• REPAIR A POOR CONNECTION AT THE CONNECTORS

OR AN OPEN CIRCUIT BETWEEN THE HARNESS SIDE
CONNECTORS 2  B-16  (12V), 5  B-16  (24V) AND 
12  B-70  

YES

NO

REPAIR OR REPLACE THE SWITCH

N8A0170E

• DOES ANY TURN SIGNAL LIGHT REMAIN

UNLIGHTED?

YES

DISCONNECT AND REINSTALL THE BULB, OR
REPLACE IT, OR REPAIR AN OPEN CIRCUIT IN
THE CIRCUIT OF THE INOPERATIVE BULB, OR
CHECK THE GROUND

N8A0171E

CAB AND CHASSIS ELECTRICAL 8-201

1-3. Hazard Warning Lights Inoperative

2. Stoplight
2-1. Both Stoplights Inoperative

N8A5203E

• IS FUSE  F-5  (10A) NORMAL?

• IS  J-9  GROUNDED SECURELY?

YES

NO

REPLACE THE FUSE

• IS BATTERY VOLTAGE APPLIED TO THE 1  B-66  OF

THE STOPLIGHT SW?

YES

NO

GROUND IT SECURELY

• IS STOPLIGHT SWITCH NORMAL?

YES

NO

REPAIR A POOR CONNECTION AT THE
CONNECTORS OR AN OPEN CIRCUIT BETWEEN
THE FUSE  F-5  (10A) AND 1  B-66 

YES

NO

• DOES THE PUSH ROD OF THE STOPLIGHT SW

OPERATE SMOOTHLY?

REPLACE THE STOPLIGHT SW

REPAIR A POOR CONNECTION AT THE CONNECTORS
OR AN OPEN CIRCUIT BETWEEN 2  B-66  AND  J-9  

YES

NO

REPLACE THE STOPLIGHT SW

N8A0173E

8-202 CAB AND CHASSIS ELECTRICAL

2-2. Stoplight on The Left (or Right) Side Inoperative

Notice:
Figure in parenthesis “( )” indicates the place of inspection for the right side stoplight.

Starter Switch

Refer to “START AND CHARGING” in this section.

Front Turn Signal Light/Bulb

Removal

1. Remove the battery ground cable at the battery.
2. Remove the front combination light.

• Open the cab door. Insert a screwdriver (1) into

the space between the cab and the cab door.
Use the screwdriver to force out the stud pin at
the center of the grommet (the pin securing the
front combination light).

• Remove the fixing screw.
• Remove the two catches.

• Remove the front combination light (1) connec-

tor.

3. Remove the front turn signal light bulb.

• Turn the bulb socket (2) to the left to remove it.
• Press the bulb (3) in and turn it to the left to re-

move it from the socket.

Installation

1. Install the front turn signal light bulb.

• While pressing the bulb (2), turn it clockwise to

fit.

Notice:
Do not let the glass portion dirty with sebum etc.

• Turn the bulb socket (3) clockwise to fit.

N8A5206E

Door side

Cab side

1

N8A5471E

2

1

3

N8A5484E

CAB AND CHASSIS ELECTRICAL 8-203

2. Installation procedure of front combination light as-

sembly

• Connect the connector of the front combination

light assembly.

• Position it by aligning two pawls with the groove

of H/L.

• Fit the iron PIN (1) in the upper portion of the

side by aligning it with the center of correspond-
ing grommet.

Notice:
Push it into securely with a force of approx. 250 N (25
kgf) until click is heard.

• Pull the front combination light assembly lightly

toward the front of vehicle to make sure that the
PIN and grommet are engaged securely.

• Tighten one bolt in the lower portion of front

combination light assembly.

3. Hook the seal rubber on two projections under H/L.
4. Connect the battery ground cable.
5. Check lighting of each light.

Rear Turn Signal Light/Bulb

Removal
Preparation:
Disconnect the battery ground cable.

1. Lens
2. Bulb

Installation
To install, follow the removal steps in the reverse order.

Turn Signal Light Switch (Combination Switch)

Inspection
Check the continuity between the terminals of the turn signal light switch.
Repair or replace the switch when the result of inspection is found abnormal.

1

3

2

N8A0445E

N8A0176E

N8A5209E