Mercury Grand Marquis Electrical System Problems
Owners have filed 312 complaints with NHTSA about electrical system problems on the Mercury Grand Marquis across 17 model years. The 2005 model year has the most (75). The words owners use most often: “lighting control module” (11% of reports).
- 312electrical system complaints
- —median miles at failure
- 13mention a crash
- 8mention an injury
- 2related recalls
- 48%of reports with a speed happened at 50+ mph
What owners describe
Phrases that appear unusually often in these complaints compared with complaints about other cars.
- Lighting control module: mentioned in 35 of 312 complaints (11%)
- High beam: mentioned in 22 of 312 complaints (7%)
- Headlights went: mentioned in 19 of 312 complaints (6%)
At what mileage do electrical system problems happen?
Based on 210 complaints that reported the odometer reading.
How serious are the reports?
Of 312 complaints, 13 mention a crash, 26 a fire, 8 an injury.
Mercury Grand Marquis electrical system complaints by model year
| Model year | Electrical System complaints | Share of that year | Median miles |
|---|---|---|---|
| 2011 Grand Marquis | 3 | 33% | 105,200 |
| 2010 Grand Marquis | 3 | 12% | 28,000 |
| 2009 Grand Marquis | 4 | 15% | 41,000 |
| 2008 Grand Marquis | 9 | 11% | 57,600 |
| 2007 Grand Marquis | 1 | 1% | — |
| 2006 Grand Marquis | 8 | 6% | 66,000 |
| 2005 Grand Marquis | 75 | 15% | 74,000 |
| 2004 Grand Marquis | 40 | 11% | 88,670 |
| 2003 Grand Marquis | 51 | 14% | 95,100 |
| 2002 Grand Marquis | 10 | 13% | 37,499 |
| 2001 Grand Marquis | 13 | 8% | 83,770 |
| 2000 Grand Marquis | 17 | 10% | 68,000 |
| 1999 Grand Marquis | 15 | 9% | 130,000 |
| 1998 Grand Marquis | 15 | 10% | 102,250 |
| 1997 Grand Marquis | 12 | 4% | 144,362 |
| 1996 Grand Marquis | 16 | 7% | 106,243 |
| 1995 Grand Marquis | 20 | 11% | 86,000 |
When owners reported it
Related recalls (2)
Electrical system:12v/24v/48v battery:cables
Model years: 2005
Problem: On certain passenger vehicles, the battery cable includes a fusible link that may contact and subsequently chafe on a #2 cross member attaching bolt.
Risk: This condition may result in heat damage and could lead to a fire.
Fix: Dealers will inspect the fusible link and position it away from the cross member bolt. If the fusible link has already chafed and copper wires have been exposed, the fusible link will be replaced. The recall began on november 18, 2005. Owners may contact ford at 1-800-392-3673, or lincoln/mercury at 1-800-521-4140.
Electrical system:wiring:fuses and circuit breakers
Model years: 1995
Problem: These vehicles were built with the non-cycling power window circuit breaker and the cycling headlamp circuit breaker interchanged.
Risk: In the event of a short or overload in the headlampcircuit, both headlamps can go out without warning, rather than flashing as intended with the cycling circuit breaker. This could lead to reduced night time driver visibility, increasing the potential for a vehicle accident.
Fix: Dealers will inspect these vehicles, remove the circuit breaker and reinstall the breaker in the correct locations.
What owners report
Short excerpts of recent complaints, with personal details removed. Full reports are on NHTSA.gov.
The contact owns a 2004 Mercury Grand Marquis. The contact stated that while the vehicle was parked, the key fob became inoperable. The contact was not able to start the vehicle with the security warning light illuminated. The dealer was not contacted. The vehicle was not diagnosed or repaired. The…
Auto lights stopped working. Tail lights will not come on
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…
This is a serious safety hazard that could result in death or injury. If I hadnât 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. This issue is…
The headlights shut off without warning
Frequently asked questions
Do all Mercury Grand Marquiss have electrical system problems?
No. NHTSA has 312 owner complaints about electrical system for the Mercury Grand Marquis. Complaint data shows that the problem is reported, not how many of all cars sold are affected.
Was there a recall on the Mercury Grand Marquis electrical system?
Yes: 2 safety recalls list electrical system. Check your VIN on NHTSA.gov to see whether the fix was done on your car.
What do owners say about electrical system problems on the Mercury Grand Marquis?
The most frequent phrase is “lighting control module”, in 35 of 312 complaints, followed by “high beam” (22).
Other Mercury Grand Marquis problems
See all Mercury Grand Marquis problems.