For 1990-2009 cars

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

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

Does the test lamp light?

--

Go to Step 2

Go to Step 3

2 |

1. Connect a test lamp from horn connector CKT 29 terminal B to CKT 1250/1350 terminal A.
2. Press the horn switch while observing the test lamp.

Does the test lamp light?

--

Go to Step 4

Go to Step 5

3 |

1. Test for a poor connection.
2. Test for an open in CKT 29, between underhood accessory wiring junction block connector C3 terminal A7/B7 and the horn connector terminal B.
3. If CKT 29 is OK, replace the underhood accessory wiring junction block. Relay/Fuse Center Replacement

Is the repair complete?

--

System OK

--

4 |

1. Test for a poor connection at the horn.
2. Replace the horn if the connection is good. Refer to Horn Replacement .

Is the repair complete?

--

System OK

--

5 |

1. Test for a poor connection.
2. If OK, repair the open in CKT 1250/1350, between the horn and G101/G102.

Is the repair complete?

--

System OK

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