For 1990-2009 cars

Step | Action | Value(s) | Yes | No
--- | --- | --- | --- | ---
1 | Did you perform the Horns System Check? | -- | Go to Step 2 | Go to Horns System Check
2 |

1. Remove the horn relay.
2. Connect a test lamp between the horn relay connector terminal R and ground.

Does the test lamp light?

--

Go to Step 3

Go to Step 4

3 |

1. Connect a test lamp between the horn relay connector terminal R and terminal S.
2. Press and hold the horn switch.

Does the test lamp light?

--

Go to Step 5

Go to Step 6

4 | Inspect CKT 1640 for an open. Refer to Wiring Repairs in Wiring Systems. Is the repair complete? | -- | Go to Horns System Check | --
5 | Connect a fused jumper between the horn relay connector terminal R and terminal T. Does the horn sound? | -- | Go to Step 8 | Go to Step 7
6 | Inspect CKT 28 and the horn switch for an open. Refer to Wiring Repairs in Wiring Systems. Is the repair complete? | -- | Go to Horns System Check | --
7 |

1. Disconnect the horn connector with the fused jumper still connected.
2. Connect a test lamp between terminal B of the horn connector and ground.

Does the test lamp light?

--

Go to Step 9

Go to Step 10

8 | Replace the horn relay. Refer to Horn Relay Replacement . Is the repair complete? | -- | Go to Horns System Check | --
9 |

1. Inspect for an open in CKT 150 and CKT 250.
2. Replace the horn, if OK. Refer to Horn Replacement - Right Side or Horn Replacement - Left Side .

Is the repair complete?

--

Go to Horns System Check

--

10 | Inspect CKT 29 and the horn switch for an open. Refer to Wiring Repairs . Is the repair complete? | -- | Go to Horns System Check | --