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Wipers Operate When Switch Is Off

  1. Turn ignition switch to RUN position. Set wiper/washer switch to OFF position. Disconnect wiper/washer switch connector. If wiper motor continues to run, go to next step. If wiper motor parks, check for shorted wires in wiper/washer switch pigtail (wires between wiper/washer switch and connector). If wires are okay, replace wiper/washer switch.
  2. Measure voltage between ground and wiper/washer switch harness connector terminal "E" (Dark Green wire). If voltage is greater than one volt, go to next step. If voltage is less than one volt (approximately zero volts), reconnect wiper/washer switch connector. Disconnect wiper motor connector. Measure voltage between ground and wiper motor connector terminal "C" (Purple wire). See Figure . If zero volts is present, replace wiper motor cover (circuit board). See Figure . If battery voltage is present, repair short to battery voltage in Purple wire.
  3. If voltage is greater than one volt, reconnect wiper/washer switch connector. Disconnect wiper motor connector. Measure voltage between ground and wiper motor harness connector terminal "D" (Dark Green wire). See Figure . If less than one volt is present, replace wiper motor cover (circuit board). See Figure . If more than one volt is present, repair short to battery voltage in Dark Green wire.
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