Windshield Wiper Test 4A - Wipers Not Working In Low 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.

Using scan tool, actuate wiper motor in low speed. If wiper motor does not operate in low speed mode, go to next step. If wiper motor operates is low speed, go to step 4).
Disconnect HI/LO wiper relay and ensure connector is clean and not damaged. Connect a jumper wire between terminals "C" (Dark Blue/Gray wire) and "D" (Brown/Orange wire) on HI/LO wiper relay. See Figure in WINDSHIELD WIPER TEST 2A. If wiper motor does not operate in low speed, disconnect jumper wire and go to next step. If wiper motor operates in low speed, replace HI/LO wiper relay.
Disconnect wiper motor Light Gray 4-pin connector and ensure connector is clean and not damaged. Reconnect jumper wire as in step 2). Using external voltmeter, measure voltage on wiper motor 4-pin connector terminal "B" (Brown/Orange wire). If voltage is more than 10 volts, replace wiper motor. If voltage is 10 volts or less, repair open in Brown/Orange wire.
Using scan tool, stop wiper motor actuation. Using scan tool, read intermittent wipe sensor. While observing scan tool display, move wiper switch to low speed position. If scan tool displays an intermittent wiper voltage of approximately 5.5 volts, replace BCM. If scan tool does not display a voltage of approximately 5.5 volts, replace multifunction switch.