Wiper On/Off Relay Output Circuit High

Monitored & Set Condition

1. When Monitored: With ignition On.
2. Set Condition: The BCM detects a high level on the Wiper On/Off Relay output when it is attempting to turn the wipers on for more than 5 seconds.

Possible Causes:

• Intermittent Condition
• Missing Relay
• Open Circuit Breaker
• Wiper On/Off Relay
• Body Control Module
• Front Wiper Park Switch Sense Circuit Open

Testing

1. Turn the ignition on. With the DRBIII(R), clear all BCM DTC's. Turn the Front Wipers on. With the DRBIII(R), read the DTC information. Does the DRBIII(R) read: WIPER ON/OFF RELAY CIRCUIT HIGH? If yes, go to next step. If no, the condition that caused the symptom is currently not present. Inspect the related wiring for a possible intermittent condition. Look for any chafed, pierced, pinched, or partially broken wires. Perform BODY VERIFICATION TEST  .
2. Turn the ignition off. Check the PDC to make certain the Wiper On/Off Relay is present. Is the Wiper On/Off Relay present? If yes, go to next step. If no, replace the missing Wiper On/Off Relay. Perform BODY VERIFICATION TEST  .
3. Turn the ignition off. Check the Junction Block Circuit Breaker No. 3. Is the Circuit Breaker open? If yes, replace the open Circuit Breaker. Perform BODY VERIFICATION TEST  . If no, go to next step.
4. Turn the ignition off. Install a known-good relay in place of the Wiper On/Off Relay. Turn the Wipers On. Do the Wipers operate normally? If yes, replace the Wiper On/Off Relay. Perform BODY VERIFICATION TEST  . If no, go to next step.
5. Turn the ignition off. Remove the Wiper On/Off Relay. Measure the voltage of the Fused B+ circuit of the Wiper On/Off Relay. Is the voltage above 10 volts? If yes, replace the Body Control Module. Perform BODY VERIFICATION TEST  . If no, repair the Front Wiper Park Switch Sense circuit for an open condition. Perform BODY VERIFICATION TEST  .