Horns Always on

*HORNS ALWAYS ON

Horns Always On:

POSSIBLE CAUSES
- Horn circuit short to battery
- Horn switch circuit short to ground
- Relay control module

DIAGNOSTIC TEST

1. TEST THE HORN CIRCUIT

Turn the ignition off.
Disconnect the Relay Control Module connector "E".

NOTE: Check connector - Clean/repair as necessary.

Turn the ignition on.

Q: Did the Horns sound?

YES: Repair the Horn circuit for a short to voltage.
Perform BODY VERIFICATION TEST. Body Verification Test
NO: Go to 2

2. MEASURE THE HORN SWITCH CIRCUIT VOLTAGE





Disconnect the Relay Control Module harness connector "D".

NOTE: Check connector - Clean/repair as necessary.

Measure the resistance of the Horn Switch circuit between cavity 1 of the Relay Control Module connector "D" and ground.

Q: Is the resistance below 5.0 ohms?

YES: Repair the Horn Switch circuit for a short to ground.
Perform BODY VERIFICATION TEST. Body Verification Test
NO: Replace the Relay Control Module.
Perform BODY VERIFICATION TEST. Body Verification Test