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Windshield Wiper Test 7A - Wiper Wash Function Not Working Properly

NOTE: Perform WINDSHIELD WIPER TEST 1A  before proceeding with this test. For connector terminal identification, refer to CONNECTOR IDENTIFICATION  . For wiring diagrams, refer to WIRING DIAGRAMS  . Perform, after each repair, TEST VER-1A - VERIFICATION PROCEDURE  .
CAUTION: Always turn ignition switch to OFF position prior to disconnecting or connecting any module connector.
  1. Ensure windshield washer fluid reservoir is full. Momentarily pull and release wash button. If washer pump did not operate, but wipers did operate, go to next step. If washer pump and wipers did not operate, go to step 5). If washer pump operated without wiper operation, replace BCM. If washer pump and wipers operated, system is operating properly.
  2. Locate and disconnect washer pump 2-pin connector at bottom of washer fluid reservoir. Ensure connector is clean and not damaged. Using external ohmmeter, measure resistance between ground and terminal "A" (Black wire) on washer pump connector. If resistance is less than 5 ohms, go to next step. If resistance is 5 ohms or greater, repair open in Black wire.
  3. Activate washer pump switch. Using external voltmeter, measure voltage on washer pump 2-pin connector terminal "B" (Brown/Dark Blue wire). If voltage is 10 volts or less, go to next step. If voltage is more than 10 volts, replace washer pump.
  4. Locate engine 14-pin connector at BCM. See Figure in CHIME TEST 3A. Do not disconnect connector. Activate washer pump switch. Using external voltmeter, measure voltage backprobing between terminal No. 10 (Brown/Dark Blue wire) on engine 14-pin connector and ground. If voltage is more than 10 volts, repair open Brown/Dark Blue wire. If voltage is 10 volts or less, replace BCM.
  5. Using scan tool, read washer switch status while pulling washer switch. If scan tool does not display WASHER SW: CLOSED, go to next step. If scan tool displays WASHER SW: CLOSED, replace Body Control Module (BCM).
  6. Locate and disconnect right multifunction switch 7-pin connector. See Figure in INSTRUMENT CLUSTER TEST 5G. Connect a jumper wire between terminals No. 1 (Dark Blue wire) and No. 3 (Brown/Dark Blue wire) on multifunction switch 7-pin connector. Using scan tool, read washer switch status while pulling washer switch. If scan tool does not display WASHER SW: CLOSED, go to next step. If scan tool displays WASHER SW: CLOSED, replace multifunction switch.
  7. Disconnect instrument panel 22-pin connector at BCM. See Figure in CHIME TEST 3A. Ensure connector is clean and not damaged. Using external voltmeter, measure voltage between ground and terminal No. 15 (Brown/Dark Blue wire) on instrument panel 22-pin connector. If voltage is more than 10 volts, replace BCM. If voltage is less than 10 volts, repair open in Brown/Dark Blue wire.
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