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Test 97A - Repairing Intermittent Wiper Problem

NOTE: For connector terminal identification, see CONNECTOR IDENTIFICATION  . For appropriate wiring diagram, see WIRING DIAGRAMS  section at the end of this article. Perform TEST VER-1B after each repair.
CAUTION: Always turn ignition off prior to disconnecting or connecting any module connector.
  1. Using scan tool, actuate wiper motor. If wipers operate during actuation, go to TEST 97B. If wipers do not operate during actuation, gain access to Body Control Module (BCM). BCM is located behind left side knee panel. Go to next step.
  2. Using scan tool in voltmeter mode, backprobe BCM Blue connector terminal No. 12 (Dark Green wire). While probe is connected, actuate wiper motor using scan tool. If voltage pulsates from more than 10 volts to less than 5 volts, go to step 4). If voltage does not pulsate from more than 10 volts to less than 5 volts, go to next step.
  3. Turn ignition off. Disconnect BCM Blue connector. Turn ignition on. Check voltage on BCM Blue connector terminal No. 12 (Dark Green wire). If voltage is less than 10 volts, repair open Dark Green wire. If voltage is more than 10 volts, replace BCM.
  4. Turn ignition off. Gain access to multifunction switch connector. Disconnect multifunction switch connector. Go to next step.
  5. Turn ignition on. Using scan tool in voltmeter mode, backprobe multifunction switch connector terminal No. 7 (Dark Green wire). Using scan tool, actuate wiper motor while observing scan tool voltage. If voltage does not pulsate from more than 10 volts to less than 5 volts, repair open Dark Green wire. If voltage pulsates from more than 10 volts to less than 5 volts, go to next step.
  6. Backprobe multifunction switch connector terminal No. 8 (Dark Green wire). Using scan tool, actuate wiper motor while observing scan tool voltage. If voltage does not pulsate from more than 10 volts to less than 5 volts, repair open Dark Green wire. If voltage pulsates from more than 10 volts to less than 5 volts, replace multifunction switch.
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