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Windshield Wipers Inoperative

WARNING: This page is about a different car, the 1997 Mercury Cougar and 1997 Ford Thunderbird. However, it is still accessible from the selected car via links, so may be relevant.
  1. Disconnect wiper motor connector. Turn ignition on. Set wiper switch for high speed operation. Check for battery voltage between Dark Green wire terminal and both Black wire terminals of harness connector. If battery voltage exists, reconnect wiper motor connector and go to next step. If battery voltage does not exist, check WIPER fuse (30-amp) at interior fuse junction panel. Replace fuse, if necessary. If fuse is good, check for open in Dark Green and Black wires. Repair wire(s) as necessary.
  2. Disconnect Integrated Control Module (ICM) 12-pin connector. Turn ignition on. Check White/Purple wire for battery voltage at ICM 12-pin connector. If battery voltage exists, reconnect ICM connector and go to next step. If battery voltage does not exist, check for open Dark Green wire or unseated connector. Repair as necessary and retest system.
  3. Turn ignition on. Set wiper switch for high-speed operation. Disconnect wiper motor connector. Check for battery voltage between White and Black wire terminals at wiper motor connector. If battery voltage does not exist, go to next step. If battery voltage exists, go to step 7).
  4. Turn ignition on. Set wiper switch for high-speed operation. Check for battery voltage between Black and White wires at ICM connector. If battery voltage does not exist, go to next step. If battery voltage exists, check for open White wire or unseated connector. Repair as necessary and retest system.
  5. Disconnect wiper switch connector. Disconnect ICM connector. Measure resistance of Brown/White wire between ICM and wiper switch connectors. Measure resistance of Orange wire between ICM and wiper switch connectors. If resistance is 3 ohms or less on both wires, go to next step. If resistance is greater than 3 ohms on either wire, repair wire(s) as necessary and retest system.
  6. Ensure wiper switch connector is disconnected. Measure resistance between Orange wire terminal and Brown/White wire terminal at wiper switch. If resistance is 5 ohms or greater, replace wiper switch and retest system. If resistance is less than 5 ohms, repair open Orange and/or Brown/White wire(s).
  7. Perform wiper motor current test. See WIPER MOTOR CURRENT TEST  . If motor is good, check wiper linkage and pivot shaft for binding. Repair as necessary. If wiper motor is faulty, replace motor and retest system.
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