Checking the Horn Switch Grounding

Checking The Horn Switch Grounding

Remove the airbag and unplug all connectors under it.





Unplug the connector:
- Steering wheel switch unit (633)













- Connect a test lamp to B+ and pin 3 of the male connector.





- The test lamp should light.

Checking the wiring harness
Jiggle the leads and in-line connectors at several places and in different directions to reveal intermittent breaks and short circuits in the wiring harness. Observe the multimeter, test lamp or diagnostic tool while doing this.

Is the function correct?

NO - Rectifying the Lead - I

YES - Checking the Control Module's Sensor Input