Diagnostic Test
- 1) TEST THE HORN CIRCUIT Turn the ignition off. Disconnect the Relay Control Module connector "E". NOTE: Check connector - Clean/repair as necessary. Turn the ignition on. Did the Horns sound? Yes Repair the Horn circuit for a short to voltage. Perform «BODY VERIFICATION TEST»(ref-250666-S04662804002007031500000) . No Go to step 2) .
- 2) MEASURE THE HORN SWITCH CIRCUIT VOLTAGE Disconnect the Relay Control Module harness connector "D". NOTE: Check connector - Clean/repair as necessary. Measure the resistance of the Horn Switch circuit between cavity 1 of the Relay Control Module connector "D" and ground. Is the resistance below 5.0 ohms? Yes Repair the Horn Switch circuit for a short to ground. Perform «BODY VERIFICATION TEST»(ref-250666-S04662804002007031500000) . No Replace the Relay Control Module. «(Refer to ELECTRICAL/POWER DISTRIBUTION/RELAY - REMOVAL)»(ref-250668-S34794958002007031500000) . Perform «BODY VERIFICATION TEST»(ref-250666-S04662804002007031500000) .
BODY VERIFICATION TEST
Turn the ignition off.
Disconnect all jumper wires and reconnect all previously disconnected components and connectors.
Note. If the SKREEM or the PCM was replaced, refer to HORN - SERVICE INFORMATION for proper programming procedures.
If the Body Control Module was replaced, turn the ignition on for 15 seconds (to allow the new BCM to learn VIN) or engine may not start.
Program all RKE transmitters and other options as necessary.
With the DRB III(R), erase all Diagnostic Trouble Codes (DTCs) from ALL modules. Start the engine and allow it to run for 2 minutes. Operate all functions of the system that caused the original complaint.
Ensure that all accessories are turned off and the battery is fully charged.
Turn the ignition off and wait 5 seconds. Turn the ignition on and using the DRB III(R), read DTCs from ALL modules.
Are any DTCs present or is the original complaint still present?
Are any DTCs present?
YES
- Repair is not complete, refer to appropriate symptom.
NO
- Repair is complete.
