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