DTC B2530 05
WARNING: This page is about a different car, the 2010 Pontiac G5 and 2010 Chevrolet Cobalt. However, it is still accessible from the selected car via links, so may be relevant.
For a short to voltage condition the fog lamps and the fog lamp switch indicator will be on at all times when the park lamps are OFF and the fog lamp switch is inactive. For an open condition, the fog lamps and the fog lamp switch indicator will not operate when the park lamps are ON and the fog lamp switch is active.