2004 Mercury Grand Marquis exterior lighting problems
207 owner complaints filed with NHTSA name the exterior lighting on the 2004 Mercury Grand Marquis — 59% of all complaints for this model year.
What owners report
“The contact owns a 2004 Mercury Grand Marquis. The contact stated that while driving at an undisclosed speed, a local Police Officer stopped the vehicle and made the contact aware that both taillights were inoperable. No warning lights were illuminated. The vehicle was taken to a dealer to be…”
filed Aug 24, 2026
“The contact owns a 2004 Mercury Grand Marquis. The contact received NHTSA Campaign Number: 15V861000 (Exterior Lighting). The contact stated that while driving at night, the headlights were flickering and became inoperable. Occasionally, the headlights operated as designed. There were no warning…”
filed Aug 29, 2025
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 | 293 | 60% |
| 2003 Grand Marquis | 207 | 57% |
| 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 2004 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.