Horns Inoperative

Diagnostic Chart (Part 1 Of 2):

Diagnostic Chart (Part 2 Of 2):

TEST DESCRIPTION
The number(s) below refer to the step number(s) on the diagnostic table.
2. Listen for an audible click when the horn relay operates Command both the ON and OFF states. Repeat the commands as necessary.
3. Tests for voltage at the coil side of the horn relay.
4. Verifies that the remote function actuator module (RFA) is providing ground to the horn relay.
5. The Control circuit includes the horn switch which is part of the steering wheel module inflatable restraint. The switch must be tested for a high resistance, an open or a short to B+ when testing the relay control circuit. Refer to Circuit Testing and Wiring Repairs in Diagrams and Inflatable Restraint Steering Wheel Module Replacement in Restraint Systems.
9. Tests for voltage at the feed side of the horn relay. The HORN fuse supplies power to the feed side of the horn relay.
18. The horns need maximum current flow to operate properly. Check the circuits for faults that would restrict current flow.