Test C: The High/Low Wiper Speeds Do Not Operate Correctly

PINPOINT TEST C: THE HIGH/LOW WIPER SPEEDS DO NOT OPERATE CORRECTLY

C1-C2:

C2-C5:

C5-C7:

C8-C9:

Normal Operation
The smart junction box (SJB) receives input from the multi-function switch through circuits CRW18 (VT/WH), CRW19 (BU/OG), CRW08 (VT/OG) and CRW17 (GN/VT). To enable the wipers, the SJB activates the RUN/PARK relay through circuit RRW24 (GN/VT). When the RUN/PARK relay is activated, voltage is supplied back to the SJB through circuit CRW03 (VT/WH) into the (integral) HIGH/LOW relay. The windshield wiper motor receives power from the HIGH/LOW relay (integral to the SJB) through circuit CRW16 (GY/BN) for low speed and circuit CRW15 (BN/WH) for high speed. The windshield wiper motor is grounded through circuit GD121 (BK/YE). The multi-function switch is grounded through circuit GD116 (BK/VT).

Possible Causes
- Open or short to ground in circuit CRW19 (BU/OG), CRW18 (VT/WH), CRW17 (GN/VT) or CRW08 (VT/OG)
- Open in circuit CRW15 (BN/WH) or CRW16 (GY/BN)
- Multi-function switch
- Windshield wiper motor
- SJB module