One problem related to electrical failure has been reported for the 2002 Mercury Grand Marquis. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2002 Mercury Grand Marquis based on all problems reported for the 2002 Grand Marquis.
During height of the rush hour at 4:00 pm I was traveling on NJ turnpike at 65 mph in the middle lane, started to hear a clicking sound. All of a sudden the car's engine stopped, had no power steering and the entire electrical system failed, (the car's battery was replaced in 12/2010) . Directional signals, and emergency flasher did not work, nor could I lower the windows. I was able to coast to the shoulder of the road when a slow moving truck was coming up on the right side. No clicking sound was heard trying to restart the car.