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Rear Wiper Switch MUX Input Open

NOTE: After making any repairs, perform BODY VERIFICATION TEST  under VERIFICATION TESTS.
  1. Turn the ignition on. With the DRB, select BODY, BODY CONTROL MODULE and read the R Wiper Switch Sensor voltage. If the DRB displays a Switch voltage greater than 4.5 volts, go to the next step. If the DRB displays a Switch voltage less than 4.5 volts, go to step  5.
  2. Turn the ignition off. Disconnect the Rear Wiper Switch harness connector. See Figure. Connect a jumper wire between the Rear Wiper Switch MUX circuit and the Rear Wiper Switch MUX Return circuit in the Rear Wiper Switch harness connector. Turn the ignition on. With the DRB, select BODY, BODY CONTROLLER and read the Rear Wiper SW volts. If the DRB R Wiper Switch Sensor voltage reads less than 0.3 Volts, replace the Rear Wiper Switch. See appropriate WIPER/WASHER SYSTEMS article. If the DRB R Wiper Switch Sensor voltage reads more than 0.3 Volts, go to the next step.
  3. Turn the ignition off to the lock position. Disconnect the Body Control Module harness connector. See Figure. Disconnect the Rear Wiper Switch harness connector. See Figure. Check connectors - Clean/repair as necessary. Measure the resistance of the Rear Wiper Switch MUX circuit from the Body Control Module connector to the Rear Wiper Switch harness connector. If the resistance is above 5 ohms, repair the Rear Wiper Switch MUX circuit for an open. If the resistance is below 5 ohms, go to the next step.
  4. Turn the ignition off to the lock position. Disconnect the Body Control Module harness connector. See Figure. Disconnect the Rear Wiper Switch harness connector. See Figure. Check connectors - Clean/repair as necessary. Measure the resistance of the Rear Wiper Switch MUX Return circuit from the Body Control Module connector to the Rear Wiper Switch harness connector. If the resistance is above 5 ohms, repair the Rear Wiper Switch MUX Return circuit for an open. If the resistance is below 5 ohms, replace the Body Control Module. See BODY CONTROL MODULE  under REMOVAL & INSTALLATION.
  5. Turn the ignition on. With the DRBIII®, erase all BCM and FCM DTCs. Turn the ignition off. The conditions necessary to set this DTC are not present at this time. Inspect the wiring and connectors specific to this circuit. Wiggle the wiring while checking for shorts and open circuits. If there were any problems found, repair as necessary. If there were no problems found, the test is complete.
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