Opel Frontera UE. Manual - part 1669

8D–106

WIRING SYSTEM

Circuit Diagram

D08R100115

SECTION

8D–107

WIRING SYSTEM

Parts Location

D08RWD18

Legend

(1) H–14
(2) SRS Coil ASM
(3) Horn Switch
(4) I–42

(5) I–32
(6) Horn (Low note)
(7) C–14
(8) C–12
(9) Horn (High note)

SECTION

8D–108

WIRING SYSTEM

Diagnosis

Horn Does Not Sound

Step

Action

Value(s)

Yes

No

1

Is the fuse F–2 normal?

—

Go to Step 2

Replace the

fuse

2

Disconnect the alarm & relay control unit connector
I–42.

Is the battery voltage applied between harness side
connector I–42 terminal 12 and the ground?

Approx. 12V

Go to Step 4

Go to Step 3

3

Repair an open circuit between the fuse F–2 and the
alarm & relay control unit.

Is the action complete?

—

Verify repair

—

4

Disconnect the horn switch connector I–32.

Is there continuity between switch side connector I–32
terminal 12 and the ground with the horn switch
pressed?

—

Go to Step 5

Repair or

replace the

switch

5

Is there continuity between harness side connector
I–32 terminal 12 and connector I–42 terminal 14?

—

Go to Step 7

Go to Step 6

6

Repair an open circuit between the alarm & relay
control unit and the horn switch.

Is the action complete?

—

Verify repair

—

7

1. Disconnect the horn connector.
2. Connect the battery positive terminal to the horn

side connector terminal 1.

Does the horn work?

—

Go to Step 8

Replace the

horn

8

Is there continuity between harness side connector
terminal between the horn and the alarm & relay control
unit?

—

Go to Step 9

Go to Step 10

9

Replace the alarm & relay control unit.

Is the action complete?

—

Verify repair

—

10

Repair an open circuit between the horn and the alarm
& relay control unit.

Is the action complete?

—

Verify repair

—

Horn Does Not Stop Sounding

Step

Action

Value(s)

Yes

No

1

Disconnect the horn switch connector I–32.

Do the horn stop sounding?

—

Repair or

replace the

horn switch

Go to Step 2

2

Disconnect the alarm & relay control unit connector
I–42.

Is there continuity between harness side connector
terminal 14 and the ground?

—

Repair short

circuit

Replace the

alarm & relay

control unit

SECTION

8D–109

WIRING SYSTEM

Dome Light, Luggage Room Light, Courtesy Light, Map Light, 

Seat Belt Switch and Warning Buzzer

General Description

The circuit consists of door switch, dome light, luggage
room light, courtesy light, map light, tail relay, key cylinder
switch and alarm & relay control unit.
Dome light comes on with dome light switch turned to
door position and any door open.
The buzzer sounds when starter switch is turned to either
“ACC” or “OFF” position and FRT door–RH, is opened
with lighting switch on.
The buzzer also sounds when FRT door–RH is opened
with starter key left in starter switch key cylinder.
These functions are controlled by the alarm & relay
control unit.

SECTION