Test J: The Defrost System Does Not Shut Off Automatically - Heated Wiper Park
PINPOINT TEST J: THE DEFROST SYSTEM DOES NOT SHUT OFF AUTOMATICALLY - HEATED WIPER PARKJ1-J2:
J2-J3:
J3 Continued:
Normal Operation
The heated wiper park relay is supplied voltage by the AJB fuse 13 (30A) through circuit 30-HB8 (RD/OG). When the ambient temperature falls below 3°C (38°F), the module grounds circuit 91S-HB7 (BN/RD), closing the heated wiper park relay. This allows voltage to flow through circuit 30S-HB42 (RD/YE) to the heated wiper park grids in the windshield. The digital automatic temperature control (DATC) module automatically switches off when the ambient temperature rises above 3°C (38°F).
Possible Causes
- circuit 30S-HB42 (RD/YE) short to voltage
- circuit 91S-HB7 (BN/RD) short to ground
- heated wiper park relay
- DATC