Isuzu N-Series. Service manual - part 1134

8-248 CAB AND CHASSIS ELECTRICAL

All Windows Do Not Operate

N8A5273E

CAB AND CHASSIS ELECTRICAL 8-249

Lock Sw Does Not Function

Window on the Driver Side Does Not Operate

REPAIR OR REPLACE THE POWER WINDOW SW
ON THE DRIVER SEAT SIDE

N8A0231E

• IS THE POWER WINDOW SWITCH ON THE DRIVER

SEAT SIDE NORMAL?

• DISCONNECT THE CONNECTOR OF THE POWER

WINDOW MOTOR ON THE DRIVER SEAT SIDE

• WHEN CONNECTING THE MOTOR CONNECTOR 

1  D-2  TO THE BATTERY (+) TERMINAL AND 2  D-2
TO THE (-) TERMINAL, DOES THE MOTOR ROTATE IN
THE "UP" DIRECTION OF THE WINDOW (OR WHEN
CONNECTING 2  D-2  TO THE (+) TERMINAL AND 
1  D-2  TO THE (-) TERMINAL, DOES THE MOTOR
ROTATE IN THE "DOWN" DIRECTION OF THE
WINDOW)?

YES

NO

REPLACE THE POWER WINDOW SWITCH
ON THE DRIVER SEAT SIDE

REPAIR A POOR CONNECTION AT THE CONNECTORS
OR AN OPEN CIRCUIT BETWEEN HARNESS SIDE
CONNECTOR TERMINALS 1  D-3  AND POWER
WINDOW MOTOR 1  D-2  OR 2  D-3  AND 2  D-2 

YES

NO

REPAIR OR REPLACE THE POWER WINDOW
MOTOR

N8A0232E

8-250 CAB AND CHASSIS ELECTRICAL

Window on the Front Passenger Side Does Not Operate

• IS THE FRONT PASSENGER SIDE POWER WINDOW

SW NORMAL?

• IS THE DRIVER´S POWER WINDOW SW NORMAL?

YES

NO

REPAIR OR REPLACE THE SW

• REMOVE THE CONNECTOR OF THE FRONT

PASSENGER SIDE POWER WINDOW MOTOR

• WHEN CONNECTING THE MOTOR CONNECTOR 

1  D-6  TO THE BATTERY (+) TERMINAL AND 2  D-6
TO THE (-) TERMINAL, DOES THE MOTOR ROTATE IN
THE "UP" DIRECTION OF THE WINDOW?  (OR WHEN
CONNECTING 2  D-6  TO THE (+) TERMINAL AND 
1  D-6  TO THE (-) TERMINAL, DOES THE MOTOR
ROTATE IN THE "DOWN" DIRECTION OF THE
WINDOW?)

YES

NO

REPAIR OR REPLACE THE SW

• WITH THE SWITCH AT THE NEUTRAL POSITION, IS

THERE ANY CONTINUITY BETWEEN THE HARNESS
SIDE CONNECTORS 1  D-6  AND 2  D-6 ?

YES

NO

REPAIR OR REPLACE THE POWER WINDOW
MOTOR

REPAIR A POOR CONNECTION AT THE CONNECTORS
OR AN OPEN CIRCUIT BETWEEN 5  D-3  AND 2  D-7  
(OR 4  D-3  AND 4  D-7 )

YES

NO

REPAIR A POOR CONNECTION AT THE
CONNECTORS OR AN OPEN CIRCUIT BETWEEN
THE PASSENGER SIDE POWER WINDOW SW
AND THE MOTOR CONNECTOR

N8A0233E

CAB AND CHASSIS ELECTRICAL 8-251

Starter Switch

Refer to “START AND CHARGING” in this section.

Power Window Switch-driver Side

Circuit Inspection
Disconnect the switch connectors to check the voltage and the continuity between the harness side connector termi-
nals.

Termi-

Item

Connect-

Wire

nal

Connected to

to be

ing

Checking conditions

Standard

color

No.

checked

terminal

1

L/W

2

L

Driver seat side motor

1-2

4

G/Y

4-5

-

Continuity

5

R/Y

5-4

6

L/B

Power window relay

Voltage

6-Ground

Starter SW "ON"

Battery voltage

8

B

Ground

Continuity

8-Ground

-

Continuity

(resistance)

Continuity

(resistance)

Passenger side power
window SW

Harness side

D-3

N8A0234E