Opel Frontera UE. Manual - part 494

8D–116

WIRING SYSTEM

Horn

General Description

The circuit consists of horn (high note), horn (low note),
horn relay (alarm & relay control unit) and horn switch.
When horn switch is pushed, (independent of position of
starter switch) horn relay is activated to sound horns.

8D–117

WIRING SYSTEM

Circuit Diagram

D08RX205

8D–118

WIRING SYSTEM

Parts Location

D08RWD18

Legend

(1) H–14
(2) SRS Coil ASM
(3) Horn Switch
(4) I–41, I–42

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

8D–119

WIRING SYSTEM

Diagnosis

Horn Do 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–41 and I–42.

Is the battery voltage applied between harness side
connector I–41 terminal 2 or 3 (6VD1), connector I–42
terminal 12 (X22SE) 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.

Is there continuity between harness side connector
I–32 terminal 12 and connector I–42 terminal 20, 23 or
14?

—

Go to Step 6

Go to Step 5

5

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

Is the action complete?

—

Verify repair

—

6

Press the horn switch.

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

—

Go to Step 7

Repair or

replace the

switch

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 Do 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 20 (23 or 14)  and the ground?

—

Repair short

circuit

Replace the

alarm & relay

control unit