Tests AH

PINPOINT TEST AH: THE DAYTIME RUNNING LAMPS ARE ON WITH THE PARKING BRAKE SET

Test AH1-AH2:

Test AH2-AH3:

Normal Operation
When the parking brake is applied, voltage on circuit 162 (LG/RD) is pulled low. This low signal is interpreted by the DRL module as a command to turn of the daytime running lamps.

Possible Causes
- circuit 162 (LG/RD) short to power
- parking brake switch
- DRL module