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Wiper Not Working At All

NOTE: After making any repairs, perform BODY CONTROL MODULES SYSTEM VERIFICATION TEST  under VERIFICATION TESTS.
  1. Turn ignition off. Remove wiper on/off relay from Power Distribution Center (PDC). See Figure . Connect a fused jumper wire between wiper on/off relay connector terminal "A", fused B+ circuit (Red/Orange wire) and terminal "B", wiper relay common circuit (Dark Green wire). If wipers operate, disconnect jumper wire, and go to next step. If wipers do not operate, leave wiper on/off relay removed, disconnect jumper wire, and go to step  14 .
  2. Ensure wiper on/off relay is properly installed in PDC. Connect scan tool to Data Link Connector (DLC). Turn ignition on. Using scan tool, read INTERMITTENT WIPER SWITCH status while operating wiper switch from off to high positions. If voltage increases from zero to 8.5 volts as switch is turned from off to high, go to next step. If voltage does not increase from zero to 8.5 volts as switch is turned from off to high, go to step  9 .
  3. Turn ignition off. Remove wiper on/off relay. Connect a 12-volt test light between ground and wiper on/off relay connector terminal "A", fused B+ circuit (Red/Orange wire). If test light illuminates, leave wiper on/off relay removed, and go to next step. If test light does not illuminate, repair open in Red/Orange wire.
  4. Substitute known-good wiper on/off relay. Turn ignition on. Operate wipers in all speeds. If wipers operate properly, replace wiper on/off relay. If wipers do not operate properly, go to next step.
  5. Turn ignition off. Remove wiper on/off relay. Disconnect Body Control Module (BCM) connector C3. Turn ignition on. Connect a jumper wire between ground and BCM connector terminal No. 4, wiper on/off relay control circuit (Red/Violet wire). See Figure . Measure resistance between ground and wiper on/of relay connector terminal "C", wiper on/off relay control circuit (Red/Violet wire). If resistance is less than 5 ohms, leave wiper on/off relay removed, BCM connector C3 disconnected, and go to next step. If resistance is 5 ohms or more, repair open in Red/Violet wire.
  6. Remove jumper wire. Turn ignition on. Measure voltage on BCM connector C3 terminal No. 4, wiper on/off relay control circuit (Red/Violet wire). If voltage is more than one volt, repair short to voltage in Red/Violet wire. If voltage is one volt or more, go to next step.
  7. Turn ignition off. Reinstall wiper on/off relay. Ensure BCM connectors are properly connected. Disconnect multifunction switch connector. Turn ignition on. Connect a 12-volt test light between ground and multifunction switch connector terminal No. 5, fused B+ circuit (Pink/Red wire). See Figure . If test light illuminates brightly, go to next step. If test light does not illuminate brightly, repair open in Pink/Red wire.
  8. Remove wiper on/off relay. Connect 12-volt test light between battery voltage and wiper on/off relay connector terminal "C", wiper on/off relay control circuit (Red/Violet wire). Using scan tool, actuate wiper on/off relay. If test light does not flash, replace BCM. If test light flashes, fault may be intermittent. Check related wiring and connectors for poor connections or damage to wiring harness. See WIRING DIAGRAMS  . Repair any problems found as necessary. If no problems are found, check if any Technical Service Bulletins (TSBs) apply to vehicle. If no TSBs apply, test is complete.
  9. Turn ignition off. Disconnect multifunction switch connector. Turn ignition on. Connect a 12-volt test light between ground and multifunction switch connector terminal No. 1, fused ignition switch output circuit (Dark Blue wire). See Figure . If test light illuminates brightly, leave multifunction switch connector disconnected, and go to next step. If test light does not illuminate brightly, repair open in Dark Blue wire.
  10. Turn ignition off. Disconnect Body Control Module (BCM) connector C2. Turn ignition on. Measure voltage on BCM connector C2 terminal No. 8, wiper switch MUX circuit (Dark Green/Red wire). See Figure . If voltage is more than one volt, repair short to voltage in Dark Green/Red wire. If voltage is one volt or less, leave connectors disconnected, and go to next step.
  11. Turn ignition off. Measure resistance of wiper switch MUX circuit (Dark Green/Red wire) between BCM connector C2 connector terminal No. 8 and multifunction switch connector terminal No. 3. See Figure and Figure . If resistance is less than 5 ohms, leave connectors disconnected, and go to next step. If resistance is 5 ohms or more, repair open in Dark Green/Red wire.
  12. Measure resistance between ground and BCM connector C2 terminal No. 8, wiper switch MUX circuit (Dark Green/Red wire). If resistance is less than 100 ohms, repair short to ground in Dark Green/Red wire. If resistance is 100 ohms or more, leave multifunction switch connector disconnected, and go to next step.
  13. Ensure BCM connectors are properly connected. Connect scan tool to Data Link Connector (DLC). Turn ignition on. Using scan tool, read INTERMITTENT WIPER SWITCH voltage. Momentarily connect a 12-volt test light between battery voltage and multifunction switch connector terminal No. 3, wiper switch MUX circuit (Dark Green/Red wire). If voltage changes from zero to more than 10 volts, replace multifunction switch. If voltage does not change from zero to more than 10 volts, replace BCM.
  14. Connect a 12-volt test between ground and wiper on/off relay connector terminal "A", fused B+ circuit (Red/Orange wire), then terminal "D", fused B+ circuit (Red/Orange wire). If test light illuminates brightly at both terminals, go to next step. If test light does not illuminate brightly at both terminals, repair open in Red/Orange wire(s).
  15. Disconnect wiper motor connector. Connect 12-volt test light between battery voltage and wiper motor connector terminal No. 5, ground circuit (Black wire). See Figure . If test light illuminates brightly, go to next step. If test light does not illuminate brightly, repair open in Black wire.
  16. Install a known-good wiper on/off relay. Turn ignition on. Operate wipers in low, then high speeds. If wipers operate properly, replace wiper on/off relay. If wipers do not operate properly, go to next step.
  17. Turn ignition off. Remove wiper on/off relay and wiper high/low relay from power distribution center. Measure resistance of wiper relay common feed circuit (Dark Green wire) between ground and wiper high/low relay connector terminal "B". See Figure . If resistance is less than 100 ohms, repair short to ground in Dark Green wire. If resistance is 100 ohms or more, leave relays removed, and go to next step.
  18. Measure resistance of wiper relay common feed circuit (Dark Green wire) between wiper on/off relay connector terminal "B" and wiper high/low relay connector terminal "B". If resistance is less than 5 ohms, go to next step. If resistance is 5 ohms or more, repair open in Dark Green wire.
  19. Turn ignition on. Disconnect wiper motor connector. Connect 12-volt test light between ground and wiper motor connector terminal No. 2, wiper relay low speed output circuit (Brown/White wire). Turn wiper speed to low speed. If test light illuminates brightly, replace wiper motor. If test light does not illuminate brightly, fault may be intermittent. Check related wiring and connectors for poor connections or damage to wiring harness. See WIRING DIAGRAMS  . Repair any problems found as necessary. If no problems are found, check if any Technical Service Bulletins (TSBs) apply to vehicle. If no TSBs apply, test is complete.
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