The car had 64600 miles on it and the headlights started going out while driving, which can be very dangerous. The problem is in the Light Control Module which is an expensive part (around $500 to $600 + labor).
Resources for the Repair and Maintenance of your 2005 Mercury Grand Marquis
2005 Mercury Grand Marquis
2005 Mercury Grand Marquis Problems
A spring in the seat belt buckle may wear or fail, causing the airbag light on the instrument panel to illuminate. Failed buckles will require replacement.
Transmission problems are common in this model, often as a result of a failed front pump. The pump loses its ability to create hydraulic pressure, which an automatic transmission needs to function. A sign of front pump failure can be a whine type noise.
One or more oxygen sensors may fail resulting in illumination of the Check Engine Light.
2005 Mercury Grand Marquis Recalls (Recent)
RepairPal Expert Overview:
The battery cable includes a fusible link that may contact the #2 cross member. Over time, this contact could damage the fusible link. The damaged link could overheat and lead to a fire. Dealers will inspect the fusible link and position it away from the cross member. A damaged fusible link will be replaced. This recall is expected to begin on November 18, 2005. The Ford recall number is 05S38.
RepairPal Expert Overview:
The intermediate shafts connect the steering column to the steering gear. Vehicles in areas where salt is used to de-ice the roads are being recalled because severe corrosion can damage the lower intermediate steering shaft. This can cause the upper intermediate shaft to collapse and separate at the lower steering column bearing. Separation will result in complete loss of steering ability. Dealers will replace the lower intermediate steering shaft and inspect the upper intermediate shaft and steering column lower bearing for damage, they will be repaired or replaced as necessary. If the steering column lower bearing has separated, a retainer clip will be installed.
Additionally, Vehicle owners located where salt is not used who have concerns regarding their steering will have a one-time option to have their vehicles inspected and, if necessary, repaired.
2005 Mercury Grand Marquis Questions and Answers
i have problem with A/C..when i accelerate its air come from Defog area or Foot area..also when climbing the bridge it comes from the Defog areas...and at the A/C panel its on auto..
ac and heater just stopped working digital system
Headlights will turn off unexpectdly during operation. seems to be an intermittent open in the circuit. I have checked and cleaned the batt cables and checked for bad ground and burned out fuses. p...
What is the average cost to replace an intake manifold gasket for the right side on a 2005 Mercury Grand Marquis with 50,000 miles?
2005 Mercury Grand Marquis Reviews
Had problems with the lighting modual at about 45,000. (BIG $$$$) Now experiencing problems with the ac-heater fan speed control. Replaced the a/c fan motor at about 35,000 miles.
Car otherwise OK. Electrical system sucks.
light control modules for my beautiful mgm failed no headlights almost ticket. ford should recall or pay me fix it. thanks for almost giving me a stroke drivin rain snow and NIGHT gwen
Love my Grand Marquis. There is a problem with the Light Control Module which is an expensive part (around $500 to $600 + labor). Apparently this is a common problem for this car around this mileage and age (6 yrs old). Ford denies there is any problem. Found 26 complaints about this on another website. Headlights tend to turn off on their own while driving down the road.
People owning this car should be aware of the problem and be prepared for it. Headlights do come back on if you turn the headlight switch back and forth, or stop and let it cool down for a few moments.
Replaced transmission at 80,000. miles and problems with the automatic temp controls failing. Bad blower motors. Car rides nice,good pep
but has been expensive.
Car has been an electrical nightmare since day 1