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Wiper Not Working At All

  1. Turn ignition off. Remove wiper on/off relay from power distribution center. Using a fused jumper wire, connect terminals "B" and "D" at wiper on/off relay socket in power distribution center. See Figure . If wipers operate, go to next step. If wipers do not operate, go to step  13 .
  2. Remove jumper wire. Install wiper on/off relay from power distribution center. Connect scan tool to Data Link Connector (DLC). Turn ignition on. Using scan tool, check intermittent wiper switch status while operating wiper switch through all positions. Voltage on display should increase for 0-8.5 volts as switch is turned from off to high. If voltage is displayed as specified, go to next step. If voltage is not displayed as specified, go to step  8 .
  3. Turn ignition off. Remove wiper on/off relay from power distribution center. Connect a test light between ground and terminal "A" at wiper on/off relay socket in power distribution center. See Figure . If test light illuminates, go to next step. If test light does not illuminate, repair power distribution circuit as necessary. See POWER DISTRIBUTION article in WIRING DIAGRAMS.
  4. Connect a test light between ground and terminal "D" at wiper on/off relay socket in power distribution center. If test light illuminates, go to next step. If test light does not illuminate, repair power distribution circuit as necessary. See POWER DISTRIBUTION article in WIRING DIAGRAMS.
  5. Replace wiper on/off relay in power distribution center with known-good unit. Turn ignition on. Operate wipers in all speeds. If wipers do not operate properly, go to next step. If wipers operate properly, replace wiper on/off relay.
  6. Turn ignition off. Remove wiper on/off relay in power distribution center. Disconnect Body Control Module (BCM) harness connector C3. Turn ignition on. Measure voltage at terminal No. 4 (Red/Violet wire) at BCM harness connector C3. See Figure . If no voltage exists, go to next step. If any voltage exists, repair short to voltage in Red/Violet wire between junction block and BCM.
  7. Turn ignition off. Connect BCM harness connector C3. Connect a test light between positive battery voltage and terminal "C" at wiper on/off relay socket in power distribution center. Using scan tool, activate wiper on/off relay. If test light illuminates, problem is intermittent. If test light does not illuminate, replace BCM.
  8. Turn ignition off. Disconnect wiper/washer switch harness connector at multifunction switch. Disconnect Body Control Module (BCM) harness connector C2. Turn ignition on. Measure voltage at terminal No. 8 (Dark Green/Red wire) at BCM harness connector C2. See Figure . If no voltage exists, go to next step. If any voltage exists, repair short to voltage in Dark Green/Red wire between wiper/washer switch and BCM.
  9. Measure voltage at terminal No. 1 (Dark Blue wire) at wiper/washer switch harness connector. See Figure . If battery voltage exists, go to next step. If battery voltage does not exist, repair open in Dark Blue wire between junction block and wiper/washer switch.
  10. Turn ignition off. Measure resistance in Dark Green/Red wire between terminal No. 3 at wiper/washer switch harness connector and terminal No. 8 at BCM harness connector C2. If resistance is 5 ohms or less, go to next step. If resistance is greater than 5 ohms, repair open in Dark Green/Red wire between wiper/washer switch and BCM.
  11. Measure resistance between ground and terminal No. 8 (Dark Green/Red wire) at BCM harness connector C2. If resistance is greater than 100 ohms, go to next step. If resistance is 100 ohms or less, repair short to ground in Dark Green/Red wire between wiper/washer switch and BCM.
  12. Connect BCM harness connector C2. Using scan tool, check intermittent wiper switch voltage. Using a test light connected to battery voltage, momentarily connect a test light between positive battery voltage and terminal No. 3 (Dark Green/Red wire) at wiper/washer switch harness connector while observing scan tool display. Voltage should change from zero volts when test light is not connected to greater than 10 volts when test light is connected. If scan tool display responds as specified, problem is intermittent. If scan tool display does not respond as specified, replace BCM.
  13. Remove jumper wire. Connect a test light between ground and terminal "D" at wiper on/off relay socket in power distribution center. If test light illuminates, go to next step. If test light does not illuminate, repair power distribution circuit as necessary. See POWER DISTRIBUTION article in WIRING DIAGRAMS.
  14. Connect a test light between ground and terminal "A" at wiper on/off relay socket in power distribution center. If test light illuminates, go to next step. If test light does not illuminate, repair power distribution circuit as necessary. See POWER DISTRIBUTION article in WIRING DIAGRAMS.
  15. Replace wiper on/off relay in power distribution center with known-good unit. Turn ignition on. Operate wipers in low and high speeds. If wipers do not operate properly, go to next step. If wipers operate properly, replace wiper on/off relay.
  16. Turn ignition off. Disconnect wiper motor harness connector. Connect a test light between positive battery voltage and terminal No. 5 (Black wire) at wiper motor harness connector. See Figure . If test light illuminates, go to next step. If test light does not illuminate, repair open in Black wire between wiper motor and ground.
  17. Remove wiper on/off relay and wiper high/low relay from power distribution center. Measure resistance in Dark Green wire between terminal "B" at wiper on/off relay socket in power distribution center and terminal "B" at wiper high/low relay socket in power distribution center. See Figure . If resistance is 5 ohms or less, go to next step. If resistance is greater than 5 ohms, repair open in Dark Green wire between wiper on/off relay and wiper high/low relay.
  18. Measure resistance between ground and terminal "B" at wiper on/off relay socket in power distribution center. If resistance is greater than 10 ohms, go to next step. If resistance is 10 ohms or less, repair short to ground in Dark Green wire between wiper on/off relay and wiper high/low relay.
  19. Install wiper on/off relay and wiper high/low relay. Turn wipers on low. Connect a test light between ground and terminal No. 2 (Brown/White wire) at wiper motor harness connector. If test light illuminates, go to next step. If test light does not illuminate, repair open in Brown/White wire between wiper motor and junction block.
  20. Turn wipers on high. Connect a test light between ground and terminal No. 1 (Red/Yellow wire) at wiper motor harness connector. If test light illuminates, replace wiper motor. If test light does not illuminate, repair open in Red/Yellow wire between wiper motor and junction block.
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