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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 ID, see CONNECTOR IDENTIFICATION  and WIRING DIAGRAMS  . Perform TEST VER-1A - VERIFICATION PROCEDURE  after each repair.
CAUTION: Always turn ignition switch to OFF position prior to disconnecting or connecting any module connector.
  1. Ensure windshield washer fluid reservoir is full. Turn ignition on. Momentarily push and release wash button on stalk switch. If washer pump does not operate, go to step 3). If washer pump operates, but wipers do not operate, go to next step. If washer pump and wipers operate, system is currently operating correctly.
  2. Using scan tool, monitor front washer switch while pushing switch. If front washer switch toggles from OFF to ON, replace Body Control Module (BCM). BCM is located with junction block under driver's side instrument panel. See Figure in CHIME TEST 2A. If front washer switch does not toggle from OFF to ON, replace junction block.
  3. Locate and disconnect washer pump 2-pin connector at bottom of washer fluid reservoir. Ensure connector is clean and not damaged. Using scan tool in voltmeter mode, check voltage on washer pump connector, terminal No. 1 (Dark Blue wire). If voltage is 10 volts or less, go to next step. If voltage is more than 10 volts, go to step 5).
  4. Access junction block connector "B". See Figure in CHIME TEST 2A. Do not disconnect connector. Using scan tool in voltmeter mode, measure voltage on terminal No. 9 (Dark Blue wire). If voltage is 10 volts or less, go to next step. If voltage is more than 10 volts, repair open Dark Blue wire.
  5. Disconnect junction block connector "B". Using scan tool in ohmmeter mode, measure resistance on terminal No. 9 (Dark Blue wire). If resistance is less than 5 ohms, repair Dark Blue wire for short to ground. If resistance is 5 ohms or greater, repair or replace or junction block.
  6. Reconnect front washer pump connector. Access junction block connector "B". See Figure in CHIME TEST 2A. Do not disconnect connector. Using scan tool in voltmeter mode, measure voltage on terminal No. 28 (Brown wire). If voltage is 10 volts or less, repair open Brown wire. If voltage is more than 10 volts, go to next step.
  7. Disconnect scan tool probe. Connect jumper wire between chassis ground and junction block connector "B", terminal No. 28 (Brown wire). If washer pump operates, go to next step. If washer pump does not operate, replace washer motor.
  8. Move jumper wire to junction block connector "D", terminal No. 13 (Brown wire). If washer pump operates, go to next step. If washer pump does not operate, replace junction block.
  9. Disconnect jumper wire. Disconnect multifunction switch. See Figure in CHIME TEST 4B. Using scan tool in voltmeter mode, measure voltage on terminal No. 11 (Brown wire). If voltage is 10 volts or less, repair open Brown wire. If voltage is more than 10 volts, replace multifunction switch.
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