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Testing (Without Intermittent Wiper System)

  1. Turn ignition switch to ON position. Pull front wiper/washer switch back. If front washer pump operates, go to next step. If front washer pump does not operate, go to step 5).
  2. Press front wiper/washer switch down to MIST position and release. If wipers sweep once and stop, go to next step. If wipers do not sweep, go to step 9). If wipers sweep more than once, go to step 11). If wipers do not complete at least one full sweep, go to step 19).
  3. Turn front wiper/washer switch to LO position. If wipers operate at low speed, go to next step. If wipers operate at high speed, go to step 13). If wipers do not operate, replace combination switch.
  4. Turn front wiper/washer switch to HI position. If wipers operate at high speed, system is operating properly. If wipers do not sweep, go to step 15). If wipers operate at low speed, go to step 17).
  5. Using a test light, backprobe between combination switch Natural 20-pin connector terminal No. 17 (Yellow/Blue wire) and ground. See the COMBINATION SWITCH CONNECTOR TERMINAL ID  . See Figure . Combination switch Natural 20-pin connector is located on steering column. If test light illuminates, go to next step. If test light does not illuminate, repair open in Yellow/Blue wire between fuse block and combination switch.
  6. Using a test light, backprobe between combination switch Natural 20-pin connector terminal No. 16 (Blue/Black wire) and ground. Pull front wiper/washer switch back. If test light illuminates, go to next step. If test light does not illuminate, replace combination switch.
  7. Turn ignition switch to LOCK position. Disconnect front washer pump connector. Using a test light, backprobe between front washer pump connector terminal No. 2 (Blue/Black wire) and ground. Connector is located on washer fluid reservoir. Turn ignition switch to ON position. Pull front wiper/washer switch back. If test light illuminates, go to next step. If test light does not illuminate, repair open in Blue/Black wire.
  8. Using an ohmmeter, backprobe between front washer pump connector terminal No. 1 (Black wire) and ground. If resistance is one ohm or more, repair Black wire between front washer pump and ground connection. If resistance is less than one ohm, replace front washer pump.
  9. Using a test light, backprobe between combination switch Natural 20-pin connector terminal No. 5 (Blue wire) and ground. See the COMBINATION SWITCH CONNECTOR TERMINAL IDENTIFICATION  . See Figure . Hold front wiper/washer switch in MIST position. If test light illuminates, go to next step. If test light does not illuminate, replace combination switch.
  10. Using a test light, backprobe between front wiper motor connector terminal No. 2 (Blue wire) and ground. Hold front wiper/washer switch in MIST position. If test light illuminates, replace front wiper motor. If test light does not illuminate, repair open in Blue wire between front wiper motor and combination switch.
  11. Using a test light, backprobe between front wiper motor connector terminal No. 2 (Blue wire) and ground. Hold front wiper/washer switch in MIST position and release. If test light illuminates and does not go out, go to next step. If test light illuminates and goes out, replace front wiper motor.
  12. Disconnect combination switch Natural 20-pin connector. Using a test light, backprobe between Natural 20-pin connector terminal No. 5 (Blue wire) and ground. See Figure . See the COMBINATION SWITCH CONNECTOR TERMINAL ID  . If test light does not illuminate, replace combination switch. If test light illuminates, repair short to battery voltage in Blue wire.
  13. Using a test light, backprobe between front wiper motor connector terminal No. 1 (Blue/Red wire) and ground. If test light illuminates, go to next step. If test light does not illuminate, replace front wiper motor.
  14. Disconnect combination switch Natural 20-pin connector. Using a test light, backprobe between combination switch Natural 20-pin connector terminal No. 6 (Blue/Red wire) and ground. See Figure . See the COMBINATION SWITCH CONNECTOR TERMINAL ID  . If test light does not illuminate, replace combination switch. If test light illuminates, repair short to battery voltage in Blue/Red wire.
  15. Using a test light, backprobe between front wiper motor connector terminal No. 1 (Blue/Red wire) and ground. If test light does not illuminate, go to next step. If test light illuminates, replace front wiper motor.
  16. Using a test light, backprobe between combination switch Natural 20-pin connector terminal No. 6 (Blue/Red wire) and ground. If test light does not illuminate, replace combination switch. If test light illuminates, repair open in Blue/Red wire.
  17. Using a test light, backprobe between front wiper motor connector terminal No. 2 (Blue wire) and ground. If test light illuminates, go to next step. If test light does not illuminate, check for high resistance (more than 3 ohms) in Blue/Red wire between front wiper motor and combination switch. If wire is okay, replace front wiper motor.
  18. Disconnect combination switch Natural 20-pin connector. Using a test light, backprobe between combination switch Natural 20-pin connector terminal No. 5 (Blue wire) and ground. If test light does not illuminate, replace combination switch. If test light illuminates, repair short to battery voltage in Blue wire.
  19. Move front wipers out of park position. Using a test light, backprobe between front wiper motor connector terminal No. 3 (Blue/White wire) and ground. If test light does not illuminate, check for open in Yellow/Blue wire between front wiper motor and splice. See WIRING DIAGRAMS  . If wire is okay, replace front wiper motor. If test light illuminates, check for open in Blue/White wire between combination switch and front wiper motor. If wire is okay, replace combination switch.
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