2005 MERCURY GRAND MARQUIS. CONSUMER REQUESTS NHTSA INVESTIGATE HEAD LIGHTS CONTROL MODULE *TGW THE CONSUMER STATED THE HEADLIGHTS STOPPED WORKING AFTER 10 MINUTES. THE LIGHTS WENT OUT SEVERAL TIMES WHILE DRIVING EARLY IN THE MORNING HOURS AND AT NIGHT. THE CONTROL MODULE WAS REPLACED AT A COST OF $ 684.54.
2005 Mercury Grand Marquis lighting problems
moderate 242 complaints filed with NHTSA · avg repair $250
Complaints
242
Recalls
0
Crashes
0
Avg fix
$250
What owners are reporting 9 most recent
TL* THE CONTACT OWNS A 2005 MERCURY GRAND MARQUIS. THE CONTACT STATED THAT WHILE DRIVING APPROXIMATELY 65 MPH, THE HEADLIGHTS AND TAILLIGHTS FAILED. THE FAILURE OCCURRED ON A INTERMITTENT BASIS. THE VEHICLE WAS INSPECTED BY A DEALER WHO INFORMED THE CONTACT THAT THAT FAILURE WAS CAUSED BY A DEFECT IN THE LIGHTING CONTROL MODULE. THE VEHICLE WAS NOT REPAIRED. THE FAILURE MILEAGE WAS APPROXIMATELY 6…
AT ANY GIVEN TIME THE LIGHTS JUST GO OUT AND I CAN ONLY SEE BY MANUALLY USING THE HIGH BEAM LIGHTS. THE LIGHTS WILL COME ON FOR A FEW MOMENTS THEN OUT THEY GO AGAIN. YOU CAN HEAR A CLICKING SOUND WHEN IT IS GOES OUT AND BACK ON. THIS IS EXTREMELY DANGEROUS ESPECIALLY SINCE I HAVE 3 CHILDREN IN MY VEHICLE AND ANY GIVEN TIME. *TR
THE HEADLIGHTS ON THE VEHICLE WENT OUT WHILE DRIVING ON THE HIGHWAY. PARKING LIGHTS STAYED ON AND FLASHERS WORKED ALLOWING TO GET THE CAR TO THE BREAK DOWN LINE. THIS HAS HAPPEN ABOUT 8-10 TIMES SINCE THE FIRST. IN CHECKING FOR A FIX, I FOUND THERE ARE A NUMBER OF COMPANIES OFFERING A REPAIR SOLUTION AND THIS LOOKS LIKE A COMMON AND DANGEROUS PROBLEM THAT OCCURS OFTEN. I NOTICED THIS HAS BEEN INV…
WHILE DRIVING WITH HEADLIGHTS ON AT NIGHT THE HEADLIGHTS TURN OFF. AFTER STOPPING AND TURNING CAR OFF AND RESTARTING ENGINE THE HEADLIGHTS EVENTUALLY START WORKING AGAIN. HAPPENED MULTIPLE TIMES THE SAME NIGHT. *TR
TL* THE CONTACT OWNS A 2005 MERCURY GRAND MARQUIS. THE CONTACT STATED THAT WHILE DRIVING AT NIGHT, THE LOW BEAM HEADLIGHTS SUDDENLY FAILED. THE VEHICLE WAS NOT DIAGNOSED OR REPAIRED. THE MANUFACTURER WAS NOT NOTIFIED OF THE FAILURE. THE FAILURE MILEAGE WAS 113,000.
NIGHTTIME, TURNED CAR OFF IN DRIVE THROUGH LINE AT FAST FOOD PLACE 185 MILES FROM HOME. HAVE LIGHT SWITCH ON AUTOMATIC. TURNED CAR ON AND DROVE OFF ONLY TO REALIZE THAT MY HEADLIGHTS WERE NOT ON. STOPPED IN ADJACENT PARKING LOT AND BEGAN PLAYING WITH THE SWITCH, TURNING CAR OFF AND ON, TRYING TO FIGURE OUT HOW TO DRIVE THREE HOURS WITH NO LIGHTS... HIGH BEAM FLASH MODE WOULD FUNCTION, BUT WOUL…
HEAD LIGHTS GO ON AND OF BY ITSELF WHILE DRIVING
TL*THE CONTACT OWNS A 2005 MERCURY GRAND MARQUIS. THE CONTACT STATED THAT THE HEADLIGHTS SHUT ON AND OFF INTERMITTENTLY; HOWEVER, THE HIGH BEAMS CONTINUE TO FUNCTION. THE HEADLIGHT SWITCH WAS REPLACED, BUT THAT DID NOT CORRECT THE FAILURE. THE DEALER STATED THAT HEADLIGHT MODULE CAUSED THE FAILURE. THE CONTACT WAS CONCERNED ABOUT THE SAFETY ISSUE. THE FAILURE AND CURRENT MILEAGES WERE 60000. UPD…
Common questions
How serious is the lighting problem on the 2005 Mercury Grand Marquis?
It's a documented issue but not catastrophic. 242 complaints have been filed. Repairs average $250 and most owners catch it before it causes a breakdown.
At what mileage does the lighting typically fail?
Mileage data is limited for this issue. Owners report failures across a wide range, suggesting cause is more about driving conditions and maintenance than mileage alone.
What does it cost to fix?
Independent shops typically charge around $250 for lighting repairs on this vehicle. Dealer pricing tends to run 20-40% higher. The exact figure depends on the specific failure mode, parts availability, and your local labor rates. If you're outside factory warranty, an extended service contract often covers this category.
Are there any recalls related to lighting?
No active recalls currently cover lighting issues on this vehicle. The complaints filed represent owner-reported failures that haven't risen to the level of a manufacturer-issued recall — but they're still worth knowing about before you buy or budget for repairs.
Other problem areas on this vehicle
Complaint and recall data sourced from the National Highway Traffic Safety Administration (NHTSA)
public records database. Severity ratings are derived from reported crashes, fires, injuries, and fatalities.
Repair cost estimates are independent-shop national averages and may differ in your area.
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