Horn Switch: Testing and Inspection

SRS components are located in this area. Review the SRS component locations, precautions, and procedures in the Supplemental Restraint System before performing repairs or service.

1. Disconnect the battery negative cable, then disconnect the positive cable, and wait at least three minutes.




2. Remove the access panel from the steering wheel, then disconnect the 2P connector between the driver's airbag and cable reel.
3. Remove the dashboard lower cover.




4. Disconnect the combination switch harness 4P connector from the main wire harness.




5. Check for continuity between the No.3 ('97 - 98 models) or No. 1 ('99-01 model) terminal of the 4P connector of the combination switch 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.




6. Remove the steering column covers, then disconnect the 4P connector from the cable reel.




7. Check for continuity between the No.3 ('97 - 98 models) or No.1 ('99-01 model) terminal of the (main wire harness side) 4P connector and the No.3 ('97 - 98 models) or No.1 ('99-01 model) terminal of the (cable reel side) 4P connector.
^ If there is no continuity, replace the combination switch harness.
^ If there is continuity, go to step 8.
8. Remove the driver's airbag assembly.




9. Check for continuity between the horn positive terminal and the steering wheel bolt with the horn switch pressed.
^ If there is continuity, check the cable reel.
^ If there is no continuity, replace the horn switch.
10. If all the tests prove OK, install the driver's airbag and reinstall the access panel on the steering wheel.
11. Reconnect the battery positive cable, then the negative cable.
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.