Daytime Running Lamps

Light Test

The BCM activates the DRL relay (all) and the headlamp grounding relay (all except Envoy, Diamond Edition and ZR2) when you select ON. The daytime running lamps illuminate until commanded OFF.

Headlamps

Light Test

The BCM activates the headlamp power relay (all except Envoy/Diamond Edition w/HID) or low beam relay (Envoy/Diamond Edition w/HID only) when you select ON. The headlamps illuminate until commanded OFF.

Parking Lamps

Light Test

The BCM activates the park lamp relay when you select ON. The park lamps illuminate until commanded OFF.

Courtesy Lamps

Light Test

The BCM activates the courtesy lamp relay when you select ON. The courtesy lamps illuminate until commanded OFF

Front Fog Lamps

Light Test

The BCM activates the FOG LP relay when you select ON. The fog lamps illuminate until commanded OFF.