Step | Action | Value(s) | Yes | No |
|---|---|---|---|---|
1 | Did you perform the Diagnostic System Check for the horn system? | -- | Go to Step 2 | |
2 | Verify the fault is present. Does the system operate normally? | -- | Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems | Go to Step 3 |
3 |
Does the horn relay turn ON and OFF both with each command of the scan tool and the horn switch? | -- | Go to Step 12 | Go to Step 4 |
4 |
Does the test lamp illuminate? | -- | Go to Step 5 | Go to Step 7 |
5 |
Caution: When you are performing service on or near the SIR components or the SIR wiring, you must disable the SIR system. Refer to Disabling the SIR System. Failure to follow the correct procedure could cause air bag deployment, personal injury, or unnecessary SIR system repairs. Important:: The horn switch is part of the steering wheel module inflatable restraint. To disable the SIR system refer to Horn Replacement in SIR. Test the control circuit of the horn relay for a high resistance or an open. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | -- | Go to Step 19 | Go to Step 6 |
6 | Inspect for poor connections at the horn relay. 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 19 | Go to Step 9 |
7 |
Did you complete the repair? | -- | Go to Step 19 | -- |
8 | Replace the horn relay. Refer to Horn Relay Replacement in Horns. Did you complete the replacement? | -- | Go to Step 19 | -- |
9 | Test the ground circuit of the horn switch for an open or high resistance. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | -- | Go to Step 19 | Go to Step 10 |
10 |
Does the test lamp turn ON and OFF both with each command of the scan tool and the horn switch? | -- | Go to Step 8 | Go to Step 11 |
11 | Replace the Horn Switch. Refer to Inflatable Restraint Steering Wheel Module Replacement in in SIR. Did you complete the replacement? | -- | Go to Step 19 | -- |
12 |
Does the test lamp illuminate? | -- | Go to Step 14 | Go to Step 13 |
13 |
Did you complete the repair? | -- | Go to Step 19 | -- |
14 |
Does the test lamp illuminate? | -- | Go to Step 16 | Go to Step 15 |
15 | Test the feed circuit of the dual horn assembly for a high resistance or an open. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | -- | Go to Step 19 | Go to Step 17 |
16 | Test the ground circuit of the dual horn assembly for a high resistance or an a open. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | -- | Go to Step 19 | Go to Step 17 |
17 | Inspect for poor connections at the dual horn assembly. 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 19 | Go to Step 18 |
18 | Replace the dual horn assembly. Refer to Disabling the SIR System in Horns. Did you complete the replacement? | -- | Go to Step 19 | -- |
19 | Operate the vehicle within the Conditions for Running the symptom. Does the symptom reoccur? | -- | Go to Step 3 | System OK |
