Horn Switch: Testing and Inspection

Horn Switch Test

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 and Installation

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






3. Using a jumper wire, connect the 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 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 the horn switch 1P connector (C) from the driver's airbag.






6. Check for continuity between the cable reel 20P connector terminal No. 4 and the 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 in the wire