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Caprice, Custom Cruiser & Roadmaster

WARNING: This page does not describe the selected car, but rather 32 other vehicles, including the 1991 Pontiac Grand Prix, 1991 Pontiac Grand Am, 1991 Pontiac Firebird, 1991 Pontiac Bonneville, and 1991 Pontiac 6000. However, it is still accessible from the selected car via links, so may be relevant.
  1. Disconnect washer pump connector. Turn ignition switch to RUN position. Connect test light between terminals "A" and "B" of washer pump connector. Activate washer switch while observing test light. If test light comes on, check for poor connection at washer motor connector. If connection is okay, replace washer pump. If test light stays off, connect test light between terminal "A" and ground. Activate washer switch.
  2. If test light is on, check for open or poor connection in circuit No. 227 (Dark Blue wire). If connection is okay, replace wiper motor module. If test light is off, use a digital voltmeter to backprobe connector C216 between terminal "F" and ground with ignition switch in RUN position. Activate washer switch.
  3. If voltage is present, check for poor connections at connectors C216 and C204 and wiper motor module. Also check for open circuit No. 94 (Pink wire). If okay, repair/replace wiper motor module. If voltage is not present, check for open or poor connection in circuit No. 94 (Pink wire). If circuit is okay, replace wiper/washer switch.
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