One problem related to exterior lighting has been reported for the 2008 Mercury Grand Marquis. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2008 Mercury Grand Marquis based on all problems reported for the 2008 Grand Marquis.
The contact owns a 2008 Mercury Grand Marquis. The contact stated that the wiring harness for the brake pedal sensor was faulty, causing the exterior brake lights to fail to illuminate. The failure almost caused a collision. The dealer was made aware of the failure and informed the contact to bring the vehicle in to be diagnosed. The vehicle was not diagnosed nor repaired by an independent mechanic or dealer. The manufacturer was not made aware of the failure. The failure mileage was approximately 80,000.
| Headlights problems | |
| Exterior Lighting problems | |
| Turn Signal problems | |
| Hazard Flashing Warning Light Unit problems |