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Wiper On/Off Relay Shorted Low/Open Circuit

  1. Turn ignition on. Using scan tool, erase BCM DTCs. Turn ignition off, then on. Turn wiper switch to each intermittent position, then low and high speed positions. Read BCM DTCs. If scan tool displays WIPER ON/OFF RELAY SHORTED LOW/OPEN CIRCUIT, go to next step. If scan tool does not display WIPER ON/OFF RELAY SHORTED LOW/OPEN CIRCUIT, test is complete. DTC is not present at this time.
  2. Remove circuit breaker No. 1 (20-amp) from junction block. See Figure. Install a known-good circuit breaker. Operate wipers. If wipers does not function correctly, go to next step. If wipers function correctly, replace circuit breaker. Perform BODY VERIFICATION TEST  under VERIFICATION TESTS.
  3. Remove wiper on/off relay located in Power Distribution Center (PDC). See Figure. Remove junction block circuit breaker No. 1. Connect a jumper wire between ground and fused ignition switch output on circuit breaker No. 1 socket (non-voltage terminal). Using DVOM, measure resistance between ground and wiper on/off relay socket terminal No. 86 (Dark Blue wire). If resistance is less than 5 ohms, go to next step. If resistance is 5 ohms or greater, repair open in Dark Blue wire. Perform BODY VERIFICATION TEST  under VERIFICATION TESTS.
  4. With DVOM still connected, remove jumper wire. If resistance is greater than 10 ohms, go to next step. If resistance is less than 10 ohms, repair short to ground in fused ignition switch output circuit (Dark Blue wire). Perform BODY VERIFICATION TEST  under VERIFICATION TESTS.
  5. Turn ignition off. Disconnect wiper motor connector. Using DVOM, measure resistance between ground and wiper motor connector terminal No. 1 (Dark Blue wire). See Fig 1. If resistance is 5 ohms or greater, go to next step. If resistance is less than 5 ohms, repair short to ground in Dark Blue wire between junction block and wiper motor. Perform BODY VERIFICATION TEST  under VERIFICATION TESTS.
  6. Remove wiper high/low relay from PDC. Using DVOM, measure resistance between ground and terminal No. 30 (Yellow/Dark Green wire) on wiper on/off or high/low relay socket. If resistance is 10 ohms or greater, go to next step. If resistance is less than 10 ohms, repair short to ground in Yellow/Dark Green wire. Perform BODY VERIFICATION TEST  under VERIFICATION TESTS.
  7. Using DVOM, measure resistance between ground and wiper high/low relay socket terminal No. 87 (Red/Yellow wire). If resistance is 10 ohms or greater, go to next step. If resistance is less than 10 ohms, repair short to ground in Red/Yellow wire. Perform BODY VERIFICATION TEST  under VERIFICATION TESTS.
  8. Using DVOM, measure resistance between ground and wiper high/low relay socket terminal No. 87A (Brown/White wire). If resistance is 10 ohms or greater, go to next step. If resistance is less than 10 ohms, repair short to ground Brown/White wire. Perform BODY VERIFICATION TEST  under VERIFICATION TESTS.
  9. Disconnect BCM connector C1. See Figure. Connect a jumper wire between ground and BCM connector C1 terminal No. 22 (Red/Violet wire). See Figure. Using DVOM, measure resistance between ground and wiper on/off relay socket terminal No. 85 (Red/Violet wire). If resistance is less than 5 ohms, go to next step. If resistance is 5 ohms or greater, repair open in Red/Violet wire. Perform BODY VERIFICATION TEST  under VERIFICATION TESTS.
  10. Using DVOM, measure resistance between ground and wiper on/off relay socket terminal No. 85 (Red/Violet wire). If resistance is 5 ohms or greater, go to next step. If resistance is less than 5 ohms, repair short to ground in Red/Violet wire. Perform BODY VERIFICATION TEST  under VERIFICATION TESTS.
  11. Ensure all components are connected except wiper on/off relay. Connect test light between terminals No. 85 and 86 on wiper on/off socket. Turn ignition on. Using scan tool, actuate wiper relay on and off. If test light pulses on and off, test is complete. If test light does not pulse, stop wiper actuation and replace BCM. See BODY CONTROL MODULE  under REMOVAL & INSTALLATION. Perform BODY VERIFICATION TEST  under VERIFICATION TESTS.
Fig 1: Identifying Wiper Motor Connector Terminals
G98C00721Courtesy of CHRYSLER CORP.
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