Isuzu N-Series. Manual - part 994

CAB AND CHASSIS ELECTRICAL 8-81

H-6, H-7, H-8

Neutral Switch

Refer to “START AND CHARGING” in this section.

Starter Relay

Refer to “START AND CHARGING” in this section.

Charge Relay

Refer to “START AND CHARGING” in this section.

Starter Switch

Refer to “START AND CHARGING” in this section.

Accel Switch

Inspection

1. Check the continuity between the switch connector

terminals.

2. Check to see if switch plunger operates smoothly.

Repair or replace the accel switch when result of
inspection is found abnormal.

Removal
Preparation:
Disconnect the battery ground cable.

1. Accel Switch

1) Disconnect the connector.
2) Remove the two screws.

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

1. Check to see if the accel pedal has been returned

by the return spring to the specified position.

Clutch Switch

Inspection

1. Check the continuity between the switch connector

terminals.

2. Check to see if switch push rod operates smoothly.

Repair or replace the switch when result of inspec-
tion is found abnormal.

1

2

1

2

1 2 3 4

5 6 7 8

9 10 11 12 13

14 15 16 17 18

2

1

2

1

4 3 2 1

8 7 6 5

13 12 11 10 9

18 17 16 15 14

H - 6

H - 7

H - 8

N8A5489E

N8A0087E

N8A0088E

N8A0089E

8-82 CAB AND CHASSIS ELECTRICAL

Removal
Preparation:
Disconnect the battery ground cable.

1. Clutch Switch

1) Disconnect the connector.
2) Loosen the lock nut of the switch.
3) Remove the switch by turning it.

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

1. Check to see if the clutch pedal has been returned

by the return spring to the specified position.

2. Turn the clutch switch clockwise until the tip of the

threaded portion of the switch contacts the pedal
arm.

3. Tighten the lock nut to the specified torque.

Tighten:
Lock nut to 13 N

⋅m (130 kg⋅cm / 115 lb⋅in)

Exhaust Brake Switch

Inspection
Check the continuity between the terminals of the exhaust brake switch.
Repair or replace the switch when the result of inspection is found abnormal.

N8A0088E

N8A0091E

CAB AND CHASSIS ELECTRICAL 8-83

Removal and Installation
Refer to “HEADLIGHT, FOG LIGHT AND CORNERING
LIGHT” in this section.

Exhaust Brake Magnetic Valve (4H Series En-
gine)

Inspection
Connect the magnetic valve connector terminal No. 1 to
the battery (+) terminal and terminal No. 2 to the (

−) ter-

minal and then check the continuity among each port.

Vacuum Switching Valve: Intake Throttle (4H
Series Engine)

Inspection
Connect the magnetic valve connector terminal No. 1 to
the battery (+) terminal and terminal No. 2 to the (

−) ter-

minal and then check the continuity among each port.
Repair or replace the vacuum switching valve when the
result of inspection is found abnormal.

N8A0094E

N8A0096E

8-84 CAB AND CHASSIS ELECTRICAL

Exhaust Brake System and Engine Control

Parts Location

For 4HE1-TC Engine

N8A0097E