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Wipers Operate Intermittently

  1. Remove wiper fuse and connect ammeter across fuse block terminals. Turn ignition switch on and operate wiper and washer pump. Observe current draw while glass is wet. If current draw exceeds 3.5 amps, remove wiper arm and blade. Repeat test. If current draw is still high, replace wiper motor. If current draw is okay, install a new wiper blade and recheck operation.
  2. If current draw was less than 3.5 amps, duplicate condition by operating wiper for approximately 5 minutes while depressing the wash button every 2 minutes. If condition still exists, replace wiper motor. If wiper operates okay, check wiper system wiring for loose connections. Check for loose ground wire from terminal "C" ("B" on wagon).
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