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Windshield Wiper Test 3A - Wipers Not Working In High Speed Mode

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. Using scan tool, actuate wipers in high speed mode. If wiper motor operates in high speed mode, go to next step. If wiper motor does not operate in high speed mode, go to step 3).
  2. Stop wiper actuation. Using scan tool, read intermittent wipe sensor voltage. While observing scan tool, turn wiper switch to high position. If scan tool displays intermittent wiper voltage 6.5 volts or less, replace multifunction switch. If scan tool displays intermittent wiper voltage more than 6.5 volts, replace Body Control Module (BCM).
  3. Stop wiper actuation. Disconnect HI/LO wiper relay and ensure connector is clean and not damaged. See Figure in WINDSHIELD WIPER TEST 2A. Using external voltmeter, measure voltage between ground and terminal "C" (Dark Blue/Gray wire) on HI/LO wiper relay. If voltage is more than 10 volts, go to next step. If voltage is 10 volts or less, repair open Dark Blue/Gray wire between HI/LO wiper relay and fuse No. 15 (10-amp).
  4. Connect a jumper wire between terminals "B" and "C" on HI/LO wiper relay socket. See Figure in WINDSHIELD WIPER TEST 2A. If wiper motor does not operate in high speed, disconnect jumper wire and go to next step. If wiper motor operates in high speed, go to step 6).
  5. Disconnect wiper motor Light Gray 4-pin connector. Ensure connector is clean and not damaged. Using external voltmeter, measure voltage on wiper motor connector terminal "A" (Red/Yellow wire). If voltage is more than 10 volts, replace wiper motor. If voltage is 10 volts or less, repair open in Red/Yellow wire.
  6. Disconnect jumper wire. Connect test light between ground and terminal "E" on HI/LO wiper relay socket. See Figure in WINDSHIELD WIPER TEST 2A. Using scan tool, actuate wipers in high speed mode and observe test light. If test light pulses on and off, replace HI/LO wiper relay. If test light does not pulse on and off, disconnect test light and go to next step.
  7. Turn ignition off and stop high speed wiper actuation. Disconnect engine 14-pin connector at BCM. Ensure connector is clean and not damaged. Connect a jumper wire between ground and terminal No. 8 (Violet/Pink wire) on engine 14-pin connector. Go to next step.
  8. Connect test light between terminals "C" and "E" on HI/LO wiper relay socket. Turn ignition on. If test light illuminates, replace BCM. If test light does not illuminate, repair open in Violet/Pink wire.
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