Electrical System Related Problems of the 2005 Mercury Grand Marquis

Table 1 shows five common electrical system related problems of the 2005 Mercury Grand Marquis. The number one most common problem is related to the electrical system (59 problems). The second most common problem is related to the headlights turn off while driving (eleven problems).

Table 1. Electrical System related problems of Mercury Grand Marquis


Recently reported Electrical System problems of the 2005 Mercury Grand Marquis

The Electrical System problem

This is a serious safety hazard that could result in death or injury. If I hadn’t escaped in time, I would have been killed. I am urging the NHTSA to investigate this defect and take immediate action to remove these vehicles from the road. Others may not be as lucky.   Read details...

The Headlights Turn Off While Driving problem

Jan 19, 2016, letter said I would be notified as soon as corrective part became available. This has been over 6 1/2 months. As I'm planning on taking an extended trip, much of it at night, in the near future, I'm concerned my headlights will suddenly go out.   Read details...

The Horn Assembly problem

: the contact stated the horn only sounded with extreme pressure being applied to the right side of the steering wheel. The horn did not sound when any other area of the steering wheel was depressed. The vehicle was taken to the service dealer, who determined the horn was not working properly, but   Read details...


Electrical System related problems in other Mercury Grand Marquis model year vehicles:



Fuel Economy of Grand Marquis Vehicles
Grand Marquis Service Bulletins
Grand Marquis Safety Recalls
Grand Marquis Defect Investigations