B1193

Horn, open-circuit (Part 1 of 2)


Fault symptom
The horn does not work
The LED flashes during the delay period

Conditions
Open-circuit registers diagnostic trouble code

Action
1 Check fuse 16
2 Check to see if the horn works
Connect the Intelligent Saab Tester (ISAT) scan tool.
Select "ACTIVATE".
Select "HORN".
Select "ON".
If the horn functions correctly, proceed to point 6. If not, proceed to point 3.
3 Check the voltage supply to the horn
Disconnect the horn.
Connect the test lamp in the 2 pin horn connector.
Repeat the ISAT scan tool command as in point 2.
When "ON" is selected, the test lamp should light.
If the test lamp lights, change the horn.
If not, proceed to point 4.







Horn, open-circuit (Part 2 of 2)

4 Check the horn +30 supply
Connect the test lamp between the horn 2 pin connector, pin 1 and a safe grounding point. The test lamp should light.
If the test lamp does n6t light, check the continuity of the cable assembly between connector pin 1 and fuse 16 and take action on this. If the test lamp lights, proceed to point 5.
5 Check the horn grounding
Control module, pin 11 grounds the horn when it is activated.
Conduct a continuity test on the cable assembly between connector pin 2 and control module pin 11.
The resistance should be <1 Ohm.
If the resistance is incorrect, remedy the fault in the cable assembly.
If the resistance is correct, proceed to point 6.
6 Check ill a diagnostic trouble code is registered
Erase the diagnostic trouble code, test drive the car and check to see if the diagnostic trouble code is re-registered.
If the diagnostic trouble code is registered, proceed to "Before Changing the Electronic Control Module". Before Changing the Electronic Control Module
If the diagnostic trouble code is not registered, the action taken is correct or the fault is of intermittent type.