The DRL headlamps will illuminate when the ignition switch is in the ON position and the transmission is shifted out of the PARK position. When the headlamp switch is in the HEAD or PARK position, the DRL is disabled and the low beam headlamps are on. The DRL can also be overridden by the twilight sentinel (TS) or the wiper ON operation.

Voltage is applied to the DRL relay at all times. The BCM sends a ground signal to the DRL relay coil when the igniton is in the ON position and the transmission is shifted out of the PARK position, energizing the DRL relay. When the DRL relay is energized, voltage is applied to the LH high beam headlamp. The LH high beam headlamp is wired in series with the RH high beam headlamp and the high beam headlamps illuminate at a reduced intensity. When the headlamp switch is in the HEAD or PARK position, the BCM will not energize the DRL relay.