For 1990-2009 cars

Step | Action | Value(s) | Yes | No
--- | --- | --- | --- | ---
1 |

1. Disconnect the inoperative horn.
2. Connect a test lamp from the horn connector CKT 29 to a good ground.
3. Press the horn switch while observing the test lamp.

Does the test lamp illuminate?

--

Go to Step 2

Go to Step 3

2 |

1. Connect a test lamp between the horn connector CKT 29 and the horn ground CKT.
2. Press the horn switch while observing the test lamp.

Does the test lamp light?

--

Go to Step 4

Go to Step 5

3 | Repair the high resistance or open in CKT 29. Did you complete the repair? | -- | System OK | --
4 |

1. Test for a poor connection at the horn.
2. If the connections are OK, replace the horn. Refer to Horn Replacement .

Did you complete the repair?

--

System OK

--

5 | Repair the high resistance or open in the horn ground CKT. Did you complete the repair? | -- | System OK | --