Horn Switch: Testing and Inspection

HORN SWITCH / TEST







CAUTION:
All SRS wire harnesses are covered with yellow insulation. Before you disconnect any part of an SRS wire harness, disconnect the airbag connectors.

Whenever the ignition switch is ON, or has been turned OFF for less than three minutes, be careful not to bump the SRS unit; the airbags could accidentally deploy and cause damage or injuries.

For additional precautions, refer to SRS Service Precautions.

NOTE: The original radio has a coded theft protection circuit. Be sure to get the customer's code number before
- disconnecting the battery.
- removing the No. 47 (7.5 A) fuse from the under-hood fuse/relay box.
- removing the radio.

After service, reconnect power to the radio and turn it ON. When the word "CODE" is displayed, enter the customer's 5-digit code to restore radio operation.

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

Driver's Side:
- Remove the access panel from the steering wheel, then disconnect the 2-P connector between the driver's airbag and cable reel.

Front Passenger's Side:
- Remove the glove box.
- Disconnect the 2-P connector between the front passenger's airbag and SRS main harness.

3. Remove the dashboard lower cover and knee bolster.







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







5. 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.

6. Remove the driver's airbag assembly.







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

8. If all tests prove OK, reinstall the driver's airbag assembly.
9. Reconnect the driver's airbag connectors, and reinstall the access panel on the steering wheel.
10. Reconnect the front passenger's airbag connector, and reinstall the glove box.
11. Connect the battery positive cable, then connect the negative cable.
12. After installing the airbag assembly, confirm that
- the SRS indicator light should come on for about 6 seconds and then go OFF with the ignition switch ON (II).
- the horn sounds with the horn button pressed.