Park, Tail, Marker and License Lamps (All countries except Japan, Taiwan, Korea)

WARNING: This page is about a different car, the 2011 Cadillac DTS. However, it is still accessible from the selected car via links, so may be relevant.

The park, tail, license, and marker lamps are turned ON when the headlamp switch is placed in either the HEAD or PARK lamp positions, or anytime the automatic light control (ALC) turns the headlamps ON. When the headlamp switch is placed in the park lamp or headlamp positions, ground is applied through the signal circuit to the BCM indicating the park lamp request. In response to this signal, the BCM applies ground through the park lamp relay control circuit energizing the PRK LAMP Relay. With the relay energized, battery voltage is applied through the switch side of the relay, both park lamp fuses, and the supply voltage circuits illuminating the park, tail, marker, and license lamps.

Park, Position, Tail, and License Lamps (Japan, Taiwan, Korea only)

The park, position, tail, and license lamps are turned ON when the headlamp switch is placed in either the HEAD or PARK lamp positions, or anytime the automatic light control (ALC) turns the headlamps ON. When the headlamp switch is placed in the park lamp or headlamp positions, ground is applied through the switch signal circuit to the BCM indicating the park lamp request. In response to this signal, the BCM applies ground through both park lamp relay control circuits energizing the PRK LAMP Relay and the RT PRK LAMP (EXP) relay. With the PRK LAMP Relay energized, battery voltage is applied through the switch side of the relay, the LT PRK LAMP fuse, and the supply voltage circuit to the left front position lamp, the left tail lamp, and to the switch side of the EXP LIC LAMP (EXP) Relay. With the RT PRK LAMP (EXP) relay energized, battery voltage is applied through the switch side of the relay, the RT PRK LAMP fuse, and the supply voltage circuits to the right front position lamp, the right tail lamp, and to the coil side of the EXP LIC LAMP (EXP) Relay energizing the relay. With the EXP LIC LAMP (EXP) Relay energized, battery voltage from the LT PRK LAMP fuse is applied through the switch side of the relay and the supply voltage circuits illuminating the license lamps.