02 Sierra DRL and low beams will not work but have power to both low beam sockets
On start up my park lights come on but not my DRL.Have power to the
sockets for low beams when the switch is on and high beams work fine.New
bulbs in low beams.
Begin by double checking all FUSE(S) and the Relay... basic system has an ambient light sensor located on the dash to the right of the center defrost vent that sends info to the BCM which controls the DRL relay. There is also a sun load sensor which is to the left of the center defrost vent. On the '02 there is a second fuse related to the DRL relay which is labeled IGNE (10 amp) which is the DRL relay power. The DRL fuse is power for DRL lamps. Regards
Search GMC Sierra 1500 Questions
GMC Sierra 1500 Experts