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 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.

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 in low speed, go to step 4).
Disconnect wiper HI/LO relay from Power Distribution Center (PDC). Connect a jumper wire between terminals "B" and "E" on wiper HI/LO relay. See Figure in EXTERIOR LIGHT TEST 2A. Using scan tool, actuate wiper motor in low speed. If wiper motor operates in low speed, replace HI/LO wiper relay. If wiper motor does not operate in low speed, go to next step.
Disconnect wiper module connector and ensure connector is clean and not damaged. See Figure in WINDSHIELD WIPER TEST 2C. Using scan tool in voltmeter mode, check voltage on wiper motor 4-pin connector, terminal No. 1 (Brown/White wire). If voltage is more than 10 volts, replace wiper motor. If voltage is 10 volts or less, repair open in Brown/White wire.
Using scan tool, stop wiper motor actuation. Move wiper switch to LOW speed position. Access Body Control Module (BCM) connector "A". BCM is located with junction block under driver's side instrument panel. See Figure in CHIME TEST 2A. Remove connector cover. Do not disconnect connector. Go to next step.
Using scan tool in voltmeter mode, backprobe terminal No. 7 (Dark Green/Red wire) on connector "A". If voltage is more than 6 volts, replace BCM. If voltage is 6 volts or less, replace multifunction switch.