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Preliminary Checks

  1. Check terminal connections and ground on wiper motor and switch. Check fuse. With ignition on, 12 volts should be to center terminal on motor.
  2. Disconnect motor connections and operate motor with jumpers by-passing wiper switch. For testing, terminal "1" is adjacent to gear box, terminal "2" is in center and terminal "3" is adjacent to motor housing. Connect power jumper to terminal "2", ground motor and operate with jumpers connected as follows: "LO" speed, connect terminals "1" and "3" to ground. "HI" speed, disconnect terminal "3", terminal "1" remains grounded. "OFF" (Park), reconnect terminal "3" and disconnect terminal "1".
  3. If motor operates correctly after by-passing switch and harness, test other system components with motor on car. If motor does not operate, continue to step four.
  4. Disconnect wiper linkage from motor crank arm and try jumper wire test again as in step two. If motor operates, check linkage for binds. If motor fails, remove motor and test motor circuits.
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