There are 3 stored owner reports matching the electrical system leading-label group for the 2010 Mercury Grand Marquis in our NHTSA-sourced dataset. These are unverified consumer reports and may not reflect confirmed defects.
This group counts stored reports whose component label starts with one of this site's matching prefixes, ignoring case. Each matching report counts once within the group. Components mentioned later in the label or only in the narrative are not searched. How component counts work
Loaded 3 of 3 matching reports.
Open the full vehicle complaint log (all categories)SPLICING ON ALMOST ALL ELECTRICAL SYSTEMS HAD COME APART. AFFECTED WERE THE RADIO, CLOCK, WINDOWS, POWER SEATS, LIGHTS, DOOR LOCKS, TRUNK RELEASE INSIDE CAR, LOW TIRE MONITOR WARNING LIGHT STAYED ON CONSTANTLY, SEAT BELT WARNING LIGHT STAYED ON, WARNING BELL FOR KEY IN IGNITION STAYED ON EXCEPT WHEN CAR WAS MOVING, DOME LIGHT WOULD NOT GO OFF WHENEVER YOU GOT OUT OF CAR. SOME OF THESE PROBLEMS WERE CONSTANT AND SOME WERE INTERMITTENT. AS A RESULT OF THE LOCKING PROBLEM, OUR VEHICLE WAS STOLEN, BUT THANKFULLY FOUND WITH NO DAMAGE. WITH NO HELP FROM OUR LOCAL FORD DEALER, I FINALLY CALLED THE FORD MOTOR CO. COMPLAINT DEPT. AND WAS TOLD TO GET A DIAGNOSTIC TEST RUN ON IT, WHICH I DID AT ANOTHER DEALERS, AND THAT IS WHEN THEY FOUND THE WIRING SPLICING PROBLEM. AS A RESULT OF THE ELECTRICAL PROBLEMS, IT HAS BLOWN THE MOTORS WHICH CONTROL BOTH THE POWER SEATS. I HAVE HAD THE WIRING FIXED BUT NOT THE MOTORS REPLACED DUE TO THE EXPENSE INVOLVED. I FEEL LIKE I HAVE A REAL LEMON ON MY HANDS AS WELL AS AN UNSAFE VEHICLE. *TR
TL* THE CONTACT OWNS A 2010 MERCURY GRAND MARQUIS. THE CONTACT STATED THAT THE AIR CONDITIONING UNIT FAILED AND WOULD ONLY EMIT AIR FROM THE DEFROSTER AND UNDER SEAT VENTS. THE CONTACT ALSO STATED THAT THE TRUNK LIGHT ILLUMINATED EVEN THOUGH THE TRUNK WAS CLOSED. THE VEHICLE WAS TAKEN TO THE DEALER FOR INSPECTION WHERE THEY STATED THAT THE AIR CONDITIONER AND TRUNK LATCH NEEDED TO BE REPLACED. THE VEHICLE WAS NOT REPAIRED. THE MANUFACTURER WAS NOTIFIED OF THE FAILURE. THE FAILURE MILEAGE WAS 63,000. UPDATED 09/05/13*LJ
TL*THE CONTACT OWNS A 2010 MERCURY GRAND MARQUIS. THE CONTACT STATED THAT THE AIR CONDITIONING SYSTEM FAILED. THE AIR CONDITIONING WOULD ERRONEOUSLY BLOW THROUGH THE DEFROST SYSTEM. THE VEHICLE WAS TAKEN TO THE MECHANIC FOR INSPECTION WHERE THE FAILURE WAS LOCATED AT THE TEMPERATURE CONTROL UNIT. THE CONTACT ALSO STATED THAT THE TEMPERATURE CONTROL UNIT WAS REPLACED TWICE PRIOR TO THE RECENT FAILURE. THE MANUFACTURER ADVISED THAT THEY WERE AWARE OF THE FAILURE AND THAT THE TEMPERATURE CONTROL UNIT WAS ON BACK ORDER. THE VEHICLE WAS NOT REPAIRED. THE FAILURE MILEAGE WAS 9,000 AND THE CURRENT MILEAGE WAS 78,000.
Complaints are unverified consumer reports submitted to NHTSA. A high complaint count may reflect vehicle popularity, not defect severity. Data sourced from NHTSA public records.
NHTSA source checks for this vehicle year
Checks are recorded separately for each dataset, not for the whole page. Dates use UTC. A missing check date does not mean no records exist.
Vehicle import recorded: Apr 28, 2026. This is the stored import date, not confirmation that every source was successfully refreshed.