Daytime Running Lamps (DRL)

The LT HDLP fuse in the IP fuse block supplies battery positive voltage to the Daytime Running Lamp (DRL) relay coil circuit. The DRL relay switch contacts are connected to the LH headlamp battery feed circuit. When the headlamp switch is placed in the OFF position, the BCM will either turn on or off the daytime running lamps, in response to the changing light conditions. The BCM energizes the DRL relay, closing the switch contacts and applying ground in place of the battery feed circuit for the LH headlamp. Battery positive voltage flows from the RT HDLP fuse through the RH headlamp and LH headlamp to ground. The headlamps illuminate at a lower intensity.