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hardly worth mentioning
Crashes / Fires:
0 / 0
Injuries / Deaths:
0 / 0
Average Mileage:
76,662 miles

About These NHTSA Complaints:

This data is from the NHTSA — the US gov't agency tasked with vehicle safety. Complaints are spread across multiple & redundant categories, & are not organized by problem.

So how do you find out what problems are occurring? For this NHTSA complaint data, the only way is to read through the comments below. Any duplicates or errors? It's not us.

2005 Mercury Grand Marquis lights problems

lights problem

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2005 Mercury Grand Marquis Owner Comments

problem #4

Dec 022014

Grand Marquis

  • 93,300 miles


The contact owns a 2005 Mercury Grand Marquis. The contact stated that while driving 20 mph, the headlights failed without warning. The contact had to turn off and restart the vehicle in order for the headlights to resume normal function. The failure recurred on numerous occasion. The vehicle was taken to the dealer. The technician diagnosed that the lighting module needed to be replaced. The vehicle was not repaired. The contact stated that the lighting module had been repaired previously under an unknown manufacturer's recall. The manufacturer was notified of the failure. The approximate failure mileage was 93,300.

- Roselle, IL, USA

problem #3

Jan 012013

Grand Marquis 8-cyl

  • Automatic transmission
  • 96,000 miles
The contact owns a 2005 Mercury Grand Marquis. The contact stated that while driving approximately 40 mph, the headlights suddenly failed. The failure occurred intermittently four different times. The vehicle was not taken to the dealer for diagnostic testing. The vehicle was not repaired. The approximate failure mileage was 96,000. Updated 4/17/13 updated 05/14/2013

- Bemus, NY, USA

problem #2

Apr 232012

Grand Marquis 8-cyl

  • Automatic transmission
  • 38,000 miles
The contact owns a 2005 Mercury Grand Marquis. The contact stated that the headlights went out while driving approximately 35 mph. The vehicle was taken to an independent mechanic for a diagnostic test. The mechanic stated that the headlight switch would have to be replaced. The manufacturer was made aware of the failure and stated that the part was not in stock. The vehicle was not repaired. The approximate failure mileage was 38,000. Updated 07/19/12 updated 07/25/12

- Muskego, WI, USA

problem #1

Jul 202011

Grand Marquis 8-cyl

  • 79,349 miles
Both headlights failed, in both dim and high-beam positions. They will not come on in either the automatic or manual dashboard switch positions. (the bulbs are still good.) the parking lights, turn signals, tail lights, and brake lights continued to function. This happened at night. It should be obvious that this failure will *always* occur at night, or during stormy weather, threatening safety, because headlights are not normally used during the daytime. Later testing revealed the problem to be intermittent. At one point, the automatic dashboard switch position worked for both dim and high-beams, but the manual switch position did not work. The next morning, both the automatic and manual positions worked. When the problem first occurred, neither position would work. This intermittent problem is consistent with a large number of complaints and reports for the 2003-2005 model years, and the problem is the lighting control module. This module is so unreliable that it has been named the "lights out module" on the internet. A sampling of complaints can be found at these web sites: This is a *safety* issue. Lives are at stake. Please force a recall to correct this problem before innocent people are killed. Although the parking lights and tail lights continued to work, so other drivers can see the car with the failed headlights, the driver of the car with the failed headlights *cannot* see where he is going!! he could run into a parked car, hit a pedestrian, hit a bicyclist, hit a tree or other obstruction, etc. This is a very dangerous situation!

- Melbourne, FL, USA

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