Horns Inoperative

HORNS INOPERATIVE

TEST DESCRIPTION

Steps 1 - 4:

Steps 5 - 10:

Steps 11 - 16:

Steps 17 - 21:

The numbers below refer to the step numbers on the diagnostic table.
4. Verifies that the dash integration module (DIM) is providing ground to the horn relay.
5. Tests for voltage at the battery positive voltage terminal of the horn relay coil.
7. Tests for voltage at the battery positive voltage terminal of the horn relay switch. The HORN fuse supplies power to the battery positive voltage terminal of the horn relay switch.
13. The horns need maximum current flow to operate properly. A high resistance (greater than 0.5 ohms) in the horn control circuit or the horn ground circuit could cause operating problems with the horns. Inspect the circuits for faults that would restrict current flow.
15. The horn relay control circuit includes the inflatable restraint steering wheel module coil, the HORN SWITCH fuse, and the horn switch. The inflatable restraint steering wheel module coil and the horn switch must be tested for a high resistance, an open or a short to voltage when testing the relay control circuit. The HORN SWITCH fuse must also be tested for an open.