Civic L4-1668cc 1.7L SOHC MFI (2003)
Horn Switch: Testing and Inspection
Horn Switch Test
1. Remove the steering column covers.
2. Disconnect the dashboard wire harness B 5P connector (A) from the cable reel (B).
3. Using a jumper wire, connect the dashboard wire harness B 5P connector (A) No.2 terminal to body ground.
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If the horn sounds, go to step 4.
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If the horn does not sound, check these items:
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horn relay
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No.7 (15 A) fuse in the under-hood fuse/relay box
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Horn.
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An open in the wire.
4. Reconnect the dashboard wire harness B 5P connector (A), and disconnect the horn switch positive 1P connector (B).
5. Using a jumper wire, connect the horn switch positive 1P connector (B) to ground.
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If the horn sounds, go to step 6.
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If the horn does not sound, replace the cable reel.
6. Reconnect the horn switch positive connector (B).