One problem related to tail light has been reported for the 2004 Mercury Grand Marquis. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2004 Mercury Grand Marquis based on all problems reported for the 2004 Grand Marquis.
The contact owns a 2004 Mercury Grand Marquis. The contact stated that while driving at an undisclosed speed, a local police officer stopped the vehicle and made the contact aware that both taillights were inoperable. No warning lights were illuminated. The vehicle was taken to a dealer to be diagnosed; however, the diagnostic result was unknown. The vehicle was serviced under an unknown recall; however, the failure persisted. The manufacturer was not notified of the failure. The failure mileage was unknown.