The contact owns a 2003 Mercury Grand Marquis. The contact that the headlights were intermittently inoperable. Additionally, the contact stated that the instrument panel lights, the brake lights, and the turn signal lights were inoperable. The contact who is a mechanic, had inspected the fuses, the fuse box, and other unknown parts, but found no failures. The dealer was notified of the failure. The vehicle was not diagnosed or repaired. The contact related the failure to the federal safety agency Campaign Number: 15V861000 (Exterior Lighting); however, the VIN was not included. The manufacturer was notified of the failure and referred the contact to the federal safety agency Hotline for assistance. The failure mileage was approximately 160,000.
2003 Mercury Grand Marquis electrical problems
51 complaints (14% of all complaints for this car). Typical mileage when it fails: 95,100. 4 crashes reported.
- owner complaints
- 51
- of this car's complaints
- 14%
- typical mileage
- 95,100
- crashes
- 4
- recalls
- 0
Which part fails
- Wiring: interior/under dash1
- Wiring1
- Instrument cluster/panel1
- Ignition1
- Alternator/generator/regulator1
- 12v/24v/48v battery1
At what mileage
Complaints by mileage at the time of the problem.
Mercury Grand Marquis electrical problems in other years
Related recalls
No recalls on record for this model year.
What 2003 Mercury Grand Marquis owners say
Most recent owner complaints, unedited.
The headlights shut off without warning
The contact owns a 2003 Mercury Grand Marquis. The contact stated that the headlights and taillights were inoperable, and the trunk failed to open. Additionally, all the doors failed to manually lock, and while utilizing the key fob, the door locks were inoperable. The door-ajar message was displayed. The local dealer was not contacted. The vehicle was not diagnosed or repaired. The manufacturer was notified of the failure and referred the contact to the federal safety agency Hotline. The contact stated that the failure was related to the federal safety agency Campaign Number: 15V861000 (Exterior Lighting). The approximate failure mileage was 179,000. The VIN was not available.
Its the LCM L(IGHT CONTROL MODULE)...HEAD LIGHTS went out on me one night coming down [XXX] causing me to wreck in a ditch and hitting a light pole INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)
O.I.N. 11523223 05/22/2023 1. Lighting Control Module: Failure 2nd time. 2.Couldn't see where I was traveling. 3. No. 4. Yes. Inspected by myself, a Mechanic and Trouble Shooter. 5. Yes. Prior to the failure, the headlamps began flashing on and off. Previously the taillights failed. No warning. Lighting Control Module Defective. Replaced Module per Recall 14N01C. Ford Dealership, Pearson Ford, INC.10650 N. Michigan RD., Zionsville, In., 317.873.3333, Service Advisor: William Haygood
I started Mercury with foot on break like normal. Shifted into reverse. Car accelerated backwards at full speed. Brakes did not stop car. Attempted to shift into neutral but went into drive instead. Car accelerated forward at full speed with my foot still on break. Car hit metal post and tree knocking them down and dragging the tree 50 to 60 feet before stopping with my foot still on the break. Car had stopped accelerating. I turned off the ignition. This unintended acceleration had happened before. Two different dealers attempted to fix the problem. Both of them thought they had been successful but it happened again. Previously, applying the brakes stopped the car, but not this time. Someone could have been injured severely or killed.
Hard to steer car, power assist not working, doors do not lock
First issue: The headlights and door chime stay on after key is removed and lights are off causing battery to drain while vehicle is not being operated. Second issue: 50 amp ignition fuse blows randomly while car is in motion which causes a complete loss of power to the car including: braking power and power steering assist. The tilt steering being raised or lowered fixes the problem temporairly on occasion. A clicking sound from the lighting control module is heard when adjusting the tilt steering also
1.rear seatbelts often jam and have to be unlocked by a professional. 2. Blend door switch that controls heat and air conditioning gets stuck on heat and blows extremely hot air year round even if the unit is turned off. Vehicle is in motion on highways and city streets. 3. Vehicle squeaks while in motion due to faulty ball bearings.
Lcm grand marquis 2003
Questions about the 2003 Mercury Grand Marquis electrical
Does the 2003 Mercury Grand Marquis have electrical problems?
Owners have filed 51 complaints about the electrical of the 2003 Mercury Grand Marquis, 14% of all its complaints.
At what mileage do 2003 Mercury Grand Marquis electrical problems start?
The typical (median) mileage in owner complaints is 95,100 miles.
Was there a recall on the 2003 Mercury Grand Marquis electrical?
There is no recall for this problem on this model year.
What year does the Mercury Grand Marquis have the most electrical problems?
The Mercury Grand Marquis model years with the most electrical complaints are 2005 (75 complaints), 2003 (51 complaints) and 1992 (41 complaints).
Other 2003 Mercury Grand Marquis problems
Lights 207Steering 28Suspension 28Acceleration 27Engine 18Transmission 12Airbags 11Fuel system 10Visibility 10Wheels 10Body 9Brakes 7Seat belts 5Seats 2Locks 1Tires 1
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