Horn Switch Test

Horn Switch Test

1. Remove the steering column covers.
2. Disconnect the dashboard wire harness 20P connector (A) from the cable reel (B).






3. Using a jumper wire, connect the dashboard wire harness 20P connector No. 1 terminal to body ground. The horns should sound.
- If the horns sound, go to step 4.
- If the horns do not sound, check these items:
- No. 12 (15 A) fuse in the under-hood fuse/relay box.
- Horn.
- MICU.
- An open in the wire.






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






5. Remove the driver's airbag assembly, and disconnect the horn switch 1P terminal (C) from the driver's airbag.
6. Check for continuity between the dashboard wire harness 20P connector No. 1 terminal and the cable reel subharness 20P connector (D) No. 11 terminal.
- If there is continuity, go to step 7.
- If there is no continuity, replace the cable reel.






7. Check for continuity between the cable reel subharness 20P connector No. 11 terminal and the horn switch 1P terminal.
- 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, repair an open in the wire.