Horn Switch Test

NOTE: SRS components are located in this area. Review the SRS component locations (see COMPONENT LOCATION INDEX ) and precautions and procedures (see PRECAUTIONS AND PROCEDURES ) before doing repairs or servicing.

Remove the driver's dashboard undercover (see DRIVER'S DASHBOARD UNDERCOVER REMOVAL/INSTALLATION ), and the driver's dashboard lower cover (see INSTRUMENT FASCIA REMOVAL/INSTALLATION ), then remove the steering column covers (see STEERING COLUMN REMOVAL AND INSTALLATION ).
Disconnect the 20P connector (A) from the cable reel (B).

Fig 1: Disconnecting 20P Connector From Cable Reel
Courtesy of AMERICAN HONDA MOTOR CO., INC.
Using a jumper wire, connect 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 (see HORN TEST/REPLACEMENT )
- An open or high resistance in the wire
Fig 2: Connecting Dashboard Wire Harness 20P Connector Terminal No. 4 To Body Ground
Courtesy of AMERICAN HONDA MOTOR CO., INC.
Reconnect the 20P connector (A) to the cable reel (B).

Fig 3: Connecting 20P Connector To Cable Reel
Courtesy of AMERICAN HONDA MOTOR CO., INC.
Remove the driver's airbag assembly (see DRIVER'S AIRBAG REPLACEMENT ), and disconnect horn switch 1P connector (C) from the driver's airbag.
Check for continuity between cable reel 20P connector terminal No. 4 and 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 or high resistance in the wire

Fig 4: Checking Continuity Between Cable Reel 20P Connector Terminal No. 4 And Horn Switch Terminal 1P

Courtesy of AMERICAN HONDA MOTOR CO., INC.