Test Description
The numbers below refer to the step numbers on the diagnostic table.
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Tests if ground is constantly being applied to the horn relay .
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The horn relay control circuit includes the horn slip. The horn slip ring and the horn switch must be tested for a short to ground when testing the relay control circuit.
Step | Action | Values | Yes | No |
|---|---|---|---|---|
1 | Did you perform the Diagnostic System Check-Vehicle? | -- | Go to Step 2 | |
2 | Is the vehicle equipped with keyless entry? | -- | Go to Step 3 | Go to Step 4 |
3 |
Is the horn ON at all times? | -- | Go to Step 4 | Go to Testing for Intermittent Conditions and Poor Connections |
4 |
Does the horn operate? | -- | Go to Step 9 | Go to Step 5 |
Connect a test lamp between the battery positive voltage circuit of the horn relay coil and the horn relay control circuit. Does the test lamp illuminate? | -- | Go to Step 6 | Go to Step 7 | |
Test the horn relay control circuit for a short to ground. Did you find and correct the condition? | -- | Go to Step 12 | Go to Step 8 | |
7 | Inspect for poor connections at the horn relay. Did you find and correct the condition? | -- | Go to Step 12 | Go to Step 10 |
8 | Inspect for poor connections at the body control module (BCM). Did you find and correct the condition? | -- | Go to Step 12 | Go to Step 11 |
9 | Repair the short to voltage in the horn control circuit. Did you complete the repair? | -- | Go to Step 12 | -- |
10 | Replace the horn relay. Did you complete the replacement? | -- | Go to Step 12 | -- |
11 |
Important: Perform the BCM programming procedure when replacing the BCM. Replace the BCM. Refer to Control Module References Does the test lamp illuminate? | -- | Go to Step 12 | -- |
12 | Operate the horn. Does the horn operate properly? | -- | System OK | Go to Step 1 |
