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, VERIFICATION TEST VER-1A - VERIFICATION PROCEDURE
.
CAUTION:
Always turn ignition switch to OFF position prior to disconnecting or connecting any module connector.
- Disconnect HI/LO wiper relay from Power Distribution Center (PDC). See Figure in EXTERIOR LIGHT TEST 2A. Turn ignition off. Turn wiper switch to LO speed position. Using external ohmmeter, measure resistance between ground and terminal "A" on HI/LO relay socket. If resistance is less than 100 ohms, repair White wire for short to ground between PDC and multifunction switch. If resistance is 100 ohms or greater, go to next step.
- Connect a jumper wire between terminals "B" and "E" on wiper HI/LO relay socket. Turn ignition on. Ensure wiper switch is in LO position. If wipers operate in low speed, replace wiper HI/LO relay. If wipers do not operate in low speed, go to next step.
- Disconnect wiper module connector. See Figure in WINDSHIELD WIPER TEST 2C. Ensure jumper wire between wiper HI/LO relay socket terminals "B" and "E" is connected.
- Using external voltmeter, measure voltage between ground and terminal No. 1 (Brown/White wire) on wiper module connector. If voltage is 10 volts or less, repair open Brown/White wire. If voltage is more than 10 volts, repair wiper motor.