Circuit/System Verification

WARNING: This page is about a different car, the 2008 Cadillac CTS. However, it is still accessible from the selected car via links, so may be relevant.

Ignition ON, observe the scan tool park lamp switch parameter while cycling the park lamp switch between the ON and OFF positions. The readings should toggle between ACTIVE and INACTIVE.
- If the readings do not change between the commanded states, refer to Park Lamp Switch Malfunction .
Ignition ON, park lamps ON, observe all park/license/marker lamps and license lamps. All park/license/marker lamps should be illuminated.
- If all park lamps are inoperative, refer to Park Lamp Switch Malfunction .
- If only the license lamps are inoperative, refer to Park, License, and/or Tail Lamps Malfunction .