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Test 109A - Washer Pump Operation

NOTE: For connector terminal identification and wiring diagrams, see BODY CONTROL COMPUTER  section in this article. Perform TEST VER-1  VERIFICATION TEST after each repair.
CAUTION: Always turn ignition off prior to disconnecting any module connector.
  1. Ensure washer fluid reservoir is full. Check windshield washer pump operation. If washer pump does not operate, go to step 5). If washer pump operates and wipers operate, system is operating properly. If washer pump operates, but wipers do not operate, go to next step.
  2. Using scan tool, read washer switch status while pushing wash button. If scan tool displays WASHER SW: CLOSED, replace Body Control Module (BCM). If scan tool does not display WASHER SW: CLOSED, go to next step.
  3. Turn ignition off. Disconnect BCM Bone connector and multifunction switch connector. BCM is located behind right kick panel. Multifunction switch connector is located on upper part of steering column, behind trim cover. Go to next step.
  4. Using an external ohmmeter, check resistance of Brown wire between BCM Bone connector terminal No. 10 (Brown wire) and multifunction switch connector terminal No. 2 (Brown wire). If resistance is 5 ohms or greater, repair open Brown wire. If resistance is less than 5 ohms, replace BCM.
  5. Ensure washer fluid lines and nozzles are not damaged or restricted. Repair as necessary. If lines and nozzles are okay, go to next step.
  6. Disconnect windshield washer pump connector. Using scan tool in ohmmeter mode, check resistance of windshield washer pump connector terminal No. 2 (Black wire). If resistance is 5 ohms or greater, repair open Black wire. If resistance is less than 5 ohms, go to next step.
  7. Push and hold windshield washer button on end of wiper/washer control. Using scan tool in voltmeter mode, check voltage on windshield washer pump connector terminal No. 1 (Brown wire). If voltage is 10 volts or less, repair open Brown wire between wiper/washer switch and windshield washer pump connector. If voltage is more than 10 volts, replace windshield washer pump.
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