Envoy and Diamond Edition W/HID

The DRL relay is supplied battery positive voltage by the IGN E fuse in the underhood fuse block. When the BCM requests DRL operation, the DRL relay coil is grounded by the BCM activating the relay. The energized DRL relay reroutes the RH high beam ground circuit to battery positive voltage supplied by the DRL fuse in the underhood fuse block. This action results in the LH and RH high beam headlamps to function in a series circuit at a reduced intensity.