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WIPER MODE SWITCH CIRCUIT LOW For a complete wiring diagram Refer to Section 8W • When Monitored: • Set Condition: Possible Causes MULTIFUNCTION SWITCH SHORTED FRONT WIPER SWITCH MUX CIRCUIT SHORT TO GROUND BODY CONTROL MODULE Diagnostic Test 1. INTERMITTENT CONDITION Turn the ignition on. With the scan tool, clear all BCM DTC’s. Turn the Wipers on. With the scan tool, read DTCs. Does the scan tool display: WIPER MODE SWITCH CIRCUIT LOW? Yes >> Go To 2 No >> The condition is not present at this time. Monitor scan tool parameters while wiggling the related wire harness. Refer to any Technical Service Bulletins that may apply. Visually inspect the related wiring har- Perform BODY VERIFICATION TEST - VER 1. 2. MULTIFUNCTION SWITCH SHORTED Turn the ignition off. Disconnect the Multifunction Switch harness connector. Turn the ignition on. With the DRBIII T , select Body, Body Control Module and read: Multifunction Switch voltage.. Does the scan tool display: Multifunction Switch voltage above 4.75 volts? Yes >> Replace the Multifunction Switch. Perform BODY VERIFICATION TEST - VER 1. No >> Go To 3 3. FRONT WIPER SWITCH MUX CIRCUIT SHORT TO GROUND Turn the ignition off. Disconnect the Body Control Module harness connector. Disconnect the Multifunction Switch harness connector. Measure resistance between ground and the Front Wiper Switch MUX circuit. Is the resistance above 5.0 ohms? Yes >> Repair the Front Wiper Switch MUX Circuit for a short to ground condition. Perform BODY VERIFICATION TEST - VER 1. No >> Replace the Body Control Module. Perform BODY VERIFICATION TEST - VER 1. 8R - 16 WIPERS/WASHERS ELECTRICAL DIAGNOSTICS KJ |