Horn Switch: Testing and Inspection

1. Make sure you have the anti-theft code for the radio, then write down the frequencies for the radio's preset buttons ('99 - 00 models).
2. Disconnect the battery negative cable, then disconnect the positive cable, and wait at least three minutes.
3. Disconnect the driver's airbag connector.
4. Remove the driver's dashboard lower cover.




5. Disconnect the cable reel sub-harness 3P connector from the main wire harness.




6. Check for continuity between the No.2 terminal of the cable reel sub-harness and body ground with the horn switch pressed.
- If there is continuity, the horn switch is OK.
- If there is no continuity, go to step 6.

7. Remove the driver's airbag assembly then disconnect the horn connector from the steering wheel.




8. Check for continuity between the No.2 terminal of the cable reel sub-harness 3P connector and horn positive terminal.
- If there is no continuity, replace the cable reel.
- If there is continuity, repair or replace the horn switch.

9. If all tests prove OK, reinstall the driver's airbag assembly and reconnect the cable reel sub-harness connector.
10. Reconnect the driver's airbag connector, and reinstall the access panel on the steering wheel.
11. Reconnect the battery positive cable, then the negative terminal.
12. After installing the airbag assembly, confirm proper system operation:
- Turn the ignition switch ON (II); the SRS indicator light should come on for about six seconds and then go off.
- Make sure both horn buttons work.

13. Enter the anti-theft code for the radio, then enter the customer's radio station presets ('99 - 00 models).