Isuzu N-Series. Manual - part 1129

8-228 CAB AND CHASSIS ELECTRICAL

Inspection of the Buzzer Circuit
Disconnect the backup buzzer connector, measure the continuity and voltage between the harness side connector
terminals.

N8A5250E

CAB AND CHASSIS ELECTRICAL 8-229

Power Door Lock

General Description

The circuit consists of the door lock switch, actuator for the front passenger door, rear doors and the door lock con-
troller.
The door lock controller is always provided with battery voltage. The key or the inside lock knob on the driver’s door
can activate the lock mechanism of all the doors.
When the driver’s door lock switch is turned on, current flows for about one second to the door lock actuator of each
door connected in parallel with the controller to activate the actuator to lock and unlock the doors.

Operation of Door Lock Controller

Notice:
Arrow marks indicate the direction of current.

When locking

the door.

Battery(+)

Relay;Door lock

Door lock sw.
(Lock position)

To actuator
(Actuator
operate
to lock side)

When locking

the door.

Battery(+)

Relay;Door lock

Door lock sw.
(Unlock position)

To actuator
(Actuator
operates to
unlock
position)

N8A0211E

8-230 CAB AND CHASSIS ELECTRICAL

Parts Location

N8A5252E

CAB AND CHASSIS ELECTRICAL 8-231

Circuit Diagram

2

3

1

2

3

6

5

4

4

2

H-11

H-11

1

B-12

B-12

B-12

B-12

B-12

B-12

D-4

D-4

D-4

2

1

2

1

1

2

2

3

1

2

1

D-8

D-8

D-9

D-9

H-18

D-10

D-10

H-11

B-7

AUDIO, DOOR LOCK

DOME LIGHT (1)

0.85R

5W

0.85R

RELAY;
DOOR LOCK

0.3R/G

0.3G/B

0.3R/G

0.3G/B

DOOR LOCK SWITCH-RH

0.3B

2B

3B

HEADLIGHT
BRACKET (LH)

0.85B

0.85BR/R

0.85BR/Y

0.85BR/R

0.85BR/Y

0.85BR/R

0.85BR/Y

0.85BR/R

0.85BR/Y

0.5BR/R

0.5BR/Y

0.5BR/R

0.5BR/Y

DOOR LOCK 
ACTUATOR-LH

DOOR LOCK
ACTUATOR-RH
(CREW CAB)

  (24V 
   MODEL)

P-5

P-3

P-4

P-1

P-2

F-4   15A

H-6

8W/B(12V)

3W/B

2

H-18

H-19

H-19

H-12

H-12

H-3

H-3

4

1

13

5

FRAME

5W/B(24V)

0.85BR/R

0.85BR/Y

0.5BR/R

0.5BR/R

0.5BR/Y

0.5BR/Y

UNLOCK

LOCK

UNLOCK

UNLOCK

UNLOCK

LOCK

LOCK

LOCK

4

3

H-2

H-2

DOOR LOCK
ACTUATOR-LH
(CREW CAB)

2L

P-3

P-4

4JH1

FL-1 100A or 120A(24V)

MAIN

N8A5253E