Diagnostic Test
- CHECK FOR AN ACTIVE DTC
- Turn the ignition on.
- Turn the Front Wiper Switch to the low speed.
- With the scan tool, read the Body Control Module (BCM) DTCs and record on the repair order.
Is the DTC active?
Yes
- Go To 2
No
- The condition or conditions that originally set this DTC are not present at this time. Using the wiring diagrams as a guide, check all related splices and connectors for signs of water intrusion, corrosion, pushed out or bent terminals and correct pin tension. If no problems are found, test complete.
- Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .
- CHECK THE WIPER ON/OFF RELAY
- Turn the front wipers off.
- Turn the ignition off.
- Remove the Wiper On/Off Relay from the Front Power Distribution Center (PDC).
- Turn the ignition on.
- Turn the Front Wiper Switch to the low speed.NOTE:
The test light must illuminate brightly. Compare the brightness to that of a direct connection to the battery.
- Using a 12-volt test light connected to ground, check the (W8) Wiper On/Off Relay Control circuit at the Wiper On/Off Relay cavity in the Front PDC.
Does the test light illuminate brightly?
Yes
- Replace the Wiper On/Off Relay.
- Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .
No
- Go To 3
- CHECK THE (W8) WIPER ON/OFF RELAY CONTROL CIRCUIT FOR A SHORT TO GROUND
- Turn the front wipers off.
- Turn the ignition off.
- Disconnect the BCM C1/A harness connector.
- Check for continuity between ground and the (W8) Wiper On/Off Relay Control circuit at the Wiper On/Off Relay cavity in the Front PDC.
Is there continuity between ground and the (W8) Wiper On/Off Relay Control circuit?
Yes
- Repair the short to ground in the (W8) Wiper On/Off Relay Control circuit.
- Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .
No
- Replace the Body Control Module (BCM) in accordance with the Service Information. Refer to MODULE, BODY CONTROL (BCM), REMOVAL .
- Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .