Horn Switch: Testing and Inspection

Horn Switch Test

NOTE: SRS components are located in this area. Review the SRS component locations Locations and precautions and procedures Service and Repair before doing repairs or servicing.

1. Remove the driver's dashboard undercover Driver's Dashboard Undercover Removal / Installation, and the driver's dashboard lower cover Driver's Dashboard Lower Cover Removal / Installation, then remove the steering column covers Steering Column Removal/Installation.

2. Disconnect the 20P connector (A) from the cable reel (B).






3. Using a jumper wire, connect dashboard wire harness 20P connector terminal No. 4 to body ground. The horns should sound.

- If the horns sound, go to step 4.
- If the horns don't sound, check these items:
- No. 13 (15 A) fuse in the under-hood fuse/relay box
- Relay control module in the under-hood fuse/relay box
- Horns Service and Repair
- An open or high resistance in the wire





4. Reconnect the 20P connector (A) to the cable reel (B).





5. Remove the driver's airbag assembly Driver's Airbag Replacement, and disconnect horn switch 1P connector (C) from the driver's airbag.

6. Check for continuity between cable reel 20P connector terminal No. 4 and horn switch terminal 1P. There should be continuity.

- If there is continuity, check the installation of the driver's airbag assembly and the steering wheel. If OK, replace the driver's airbag assembly.
- If there is no continuity, check these items:
- Cable reel
- An open or high resistance in the wire