SAAB WIS ONLINE

Horn

Symptom: Horn sounds continuously.

Horn

Fault symptom



Horn sounds continuously.



Diagnostic procedure

1 Check the horn




- Disconnect the horn.

- Connect the test lamp between the 1-pin horn connector, with the black lead, and Batt+.


Does the lamp light up?

yes

Continue with point 2.


no

Change the horn.


2 Check the horn's ground connection




- Check the continuity between the 1-pin horn connector, with the black lead, and the alarm control module, pin 11.

- Also take a resistance reading across the connector and ground.


The resistance should be < 1 ohm.

Is the resistance correct?

yes

Continue with point 3.


no

Repair or replace the wiring harness.


3 Final check

Check to see if the fault symptom remains.

Is the problem still present?

yes

See "Before replacing a control module".


no

The remedial measures taken were correct or the fault is of intermittent nature.