Diagnostic Test

CHECK FOR AN ACTIVE DTC
1. 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 (W8) WIPER ON/OFF RELAY CONTROL CIRCUIT FOR A SHORT TO VOLTAGE
NOTE:
Make sure the Front Wiper Switch is off when performing this step.
1. Turn the ignition off.
2. Remove the Wiper On/Off Relay from the Front Power Distribution Center (PDC).
3. Turn the ignition on.
4. Measure the voltage between ground and the (W8) Wiper On/Off Relay Control circuit at the Wiper On/Off Relay cavity in the Front PDC.
  Is there any voltage present?
  
  Yes
  - Repair the short to voltage in the (W8) Wiper On/Off Relay Control circuit.
  - Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .
  No
  - Go To 3
CHECK THE (W8) WIPER ON/OFF RELAY CONTROL CIRCUIT FOR AN OPEN
1. Turn the ignition off.
2. Disconnect the BCM C1/A harness connector.
3. Measure the resistance of the (W8) Wiper On/Off Relay Control circuit between the BCM C1/A harness connector and the Wiper On/Off Relay cavity in the Front PDC.
  Is the resistance above 3.0 Ohms?
  
  Yes
  - Repair the open in the (W8) Wiper On/Off Relay Control circuit.
  - Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .
  No
  - Go To 4
CHECK THE BCM
1. Reconnect the BCM C/1A harness connector.
2. Turn the ignition on.
3. 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.
4. With 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
  - 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 .