2007 g6 gt ????? Pontiac ?
The headlamp switch is a input to the BCM - body control module , the BCM turn's the park / headlamps on .
Park, Tail and Marker Lamps
The park, tail, and marker lamps, including the license lamps, are turned ON when the headlamp switch is placed in the PARK or HEADLAMP position, or anytime the headlights are requested. The PARK LAMPS fuse in the rear fuse block supplies battery positive voltage to the PARK LAMP relay switch contacts. The PARK LAMPS fuse in the rear fuse block also supplies battery positive voltage to the PARK LAMP relay coil. When the park lamps are turned ON, the body control module (BCM) energizes the park lamp relay. Current flow is from the PARK LAMP relay to their respective park and marker lamps and to ground. Ground is provided at G101, G102, G401, and G403.
With no information on what driving conditions have been or what you have tried thus far, wires grounded or corroded, corrosion in bulb sockets or possibly dead bulbs.
there may also be resettable breakers located somewhere, often under the hood. In some cars with certain options a bad flasher relay also kills parking lamps.
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