The number(s) below refer to the step number(s) on the diagnostic table.
Step | Action | Yes | No |
---|---|---|---|
DEFINITION: This diagnostic procedure is for use with systems that have multiple horns in which one of the horns is inoperative. | |||
1 | Is the vehicle equipped with content theft deterrent (UA6)? | Go to Step 2 | Go to Step 3 |
2 | Did you perform the Horns Diagnostic System Check? | Go to Step 4 | |
3 | Did you review the Horns operation and perform the necessary inspections? | Go to Step 4 | Go to Symptoms - Horns |
4 | Depress the horn switch. Do both of the horns operate? | Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems | Go to Step 5 |
5 |
Does the test lamp illuminate? | Go to Step 6 | Go to Step 9 |
6 |
Does the test lamp illuminate? | Go to Step 7 | Go to Step 10 |
7 | Inspect for poor connections at the inoperative horn. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 13 | Go to Step 8 |
8 |
Does the horn sound? | Go to Step 11 | Go to Step 12 |
9 | Repair the open or poor connection in the horn control circuit. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you complete the repair? | Go to Step 13 | -- |
10 | Repair the open or poor connection in the horn ground circuit. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you complete the repair? | Go to Step 13 | -- |
Repair the high resistance in the horn control circuit or the horn ground circuit of the horn. (A resistance as low as 0.5 ohms could cause operating problems with the horn.) Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you complete the repair? | Go to Step 13 | -- | |
12 | Replace the inoperative horn. Refer to Horn Replacement . Did you complete the replacement? | Go to Step 13 | -- |
13 | Operate the horns. Do the horns operate properly? | System OK | Go to Step 1 |