2003 Mercury Grand Marquis exterior lighting problems
207 owner complaints filed with NHTSA name the exterior lighting on the 2003 Mercury Grand Marquis — 57% of all complaints for this model year.
What owners report
“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…”
filed May 13, 2025
“The Lighting Control Module has failed and my brake lights and dash board lights turn off after couple minutes while driving with the lights on. I took my vehicle in to dealer already once for problem to be fixed a year ago. They did repair but now same problem is occurring again. I went back to…”
filed May 6, 2025
“While driving my vehicle headlights turn off and back on, sometimes off for minutes sometimes flickering.”
filed May 14, 2026
Verbatim excerpts from complaints filed with NHTSA. Reports are not independently verified.
Related recalls
- Affected vehicles have a lighting control module (LCM) that may fail, resulting in a loss…Campaign 15V861000 · Dec 22, 2015
Related service bulletins
Ford: the lighting control module has extended warranty coverage, on certain vehicles, due to a possible crack on solder joint that connects relay to circuit board. Model 2003-2005 crown victoria, grand marquis. *pe
CSP-14-N-01 · Service Bulletin/Repair Instructions · issued Apr 11, 2014
Exterior Lighting problems in other Grand Marquis years
| Year | Reports | Share |
|---|---|---|
| 2010 Grand Marquis | 2 | 8% |
| 2009 Grand Marquis | 1 | 4% |
| 2008 Grand Marquis | 5 | 6% |
| 2007 Grand Marquis | 5 | 5% |
| 2006 Grand Marquis | 6 | 4% |
| 2005 Grand Marquis | 292 | 60% |
| 2004 Grand Marquis | 206 | 59% |
| 2002 Grand Marquis | 6 | 8% |
| 2001 Grand Marquis | 11 | 7% |
| 2000 Grand Marquis | 21 | 13% |
| 1999 Grand Marquis | 20 | 12% |
| 1998 Grand Marquis | 16 | 11% |
Other reported problem areas on the 2003 Mercury Grand Marquis
Counts are unique NHTSA complaints naming this component group. Complaints are unverified owner reports; mileage is computed only from complaints that included a usable odometer reading.