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Test O

PINPOINT TEST O: THE DEFROST SYSTEM IS INOPERATIVE - HEATED WIPER PARK


Test O1-O2:






Test O2-O3:






Test O3-O4:






Test O5:






Test O6:






Test O7:






Normal Operation
The heated wiper park relay is powered by the auxiliary junction box (AJB) fuse 13 (30A) through circuits 30-HB8 (RD/OG) and 30-HB8A (RD/OG). when the ambient temperature falls below 3°C (38°F), the dual automatic temperature control (DATC) module will ground circuit 91S-HB7 (BN/RD), closing the heated wiper park relay. This will allow power to flow through circuit 30S-HB42 (RD/YE) to the heated wiper park grids in the windshield.

Possible Causes
- circuits 30S-HB42 (RD/YE), 91S-HB7 (BN/RD), 30-HB8 (RD/OG), 30-HB8A (RD/OG), 31-HB42 (BK/YE) open
- heated wiper park relay
- DATC module
- heated wiper park grids
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