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10.0

really awful
Crashes / Fires:
2 / 0
Injuries / Deaths:
0 / 0
Average Mileage:
72,339 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 (Page 10 of 11)

« Read the previous 20 complaints

problem #32

Dec 102010

Grand Marquis

  • 59,000 miles

A D V E R T I S E M E N T S

The contact owns a 2005 Mercury Grand Marquis. While driving at any speed, the contact noticed that all the lights on the vehicle would suddenly shut off without warning and the contact was forced to use the hazard lights. The dealer was notified but was unable to diagnose the failure. The manufacturer was informed and the contact was awaiting a response. The vehicle was not repaired. The current and failure mileages were approximately 59,000.

- Princeton , NC, USA

problem #31

Nov 072010

Grand Marquis 8-cyl

  • Automatic transmission
  • 58,000 miles
The contact owns a 2005 Mercury Grand Marquis. While driving 25 mph at night, both headlights failed. The vehicle was taken to an authorized dealer who stated that he would have to replace the entire unit. The vehicle was then taken to a local repair shop where the lights were repaired. The contact called the manufacturer who offered no assistance. The failure mileage was approximately 58,000. Updated 03/16/11

- South St. Paul, MN, USA

problem #30

Jul 302010

Grand Marquis

  • 87,000 miles
The contact owns a 2005 Mercury Grand Marquis. While driving approximately 55 mph all of the exterior lights shut off. The vehicle was driven onto the emergency lane and after tapping on the dashboard the lights came back on. The failure had since recurred intermittently. The vehicle was taken to an independent mechanic and repaired; yet, the failure continued to occur. The failure mileage was 87,000. The current mileage was 87,500.

- Lewistown, PA, USA

problem #29

Jan 102009

Grand Marquis

  • 65,000 miles

A D V E R T I S E M E N T S

Was driving on frreway at night when lights turned off pulled over on side of the freeway switch the lights on off for about 3 min then they turned on. Since then it has been a very life threatning situation when driving at night lights turn off more freaquenty ready to sue Ford for not takeing responsobility and issuing a national recall for this deffect. I was told by a close friend that works for a Mercury dealer that it is the lighting control module and that all police vehicles with this problem had them replaced.

- N Las Vegas, NV, USA

problem #28

Nov 022010

Grand Marquis 8-cyl

  • 88,000 miles
Headlights turn off without warning, driving on dark streets at night could be dangerous. After a search found thousands of same complaints, lighting control module seems to be the problem. The part is very expensive, not counting labor.

- Rock Island, TN, USA

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problem #27

Nov 112010

Grand Marquis 8-cyl

  • 85,000 miles
2005 Mercury Grand Marquis 85,000 miles, headlights go out at any speed when hitting a bump or pot hole. No high beam or low beams but flash to pass will light both high and low if turn signal arm is held back.

- Lexington, SC, USA

problem #26

Jul 052010

Grand Marquis 6-cyl

  • Automatic transmission
  • 85,000 miles

A D V E R T I S E M E N T S

The contact owns a 2005 Mercury Grand Marquis. The contact was driving at night approximately 40 mph with the headlights activated, and after thirty minutes, the headlights became inoperative. The contact activated the hi-beams and continued driving. The failure occurred intermittently. The vehicle was taken to a dealer where they stated that the lighting control module needed to be replaced. The vehicle was not repaired. The failure mileage was 85,000. Updated 02/23/11 the consumer stated the headlights continue to malfunction. The lights would go out while the consumer was driving. Updated 03/07/11

- Arlington, TX, USA

problem #25

Jul 052010

Grand Marquis 8-cyl

  • 113,776 miles
2005 Mercury Grand Marquis headlamp failure headlamps fail to come on, can not see to drive at night unless holding high beams on. The head lamps on low beam do not work at, I am only able to drive this car during the day time because I am unable to pay the $730 to repair the module. The car is only 5 years old. I have been unsuccessful at finding a used part. The problem started in July of 2010 and it now October.

- Chester, SC, USA

problem #24

Aug 202010

Grand Marquis

  • 41,000 miles
The headlights of my 2005 Mercury Grand Marquis suddenly went off and the only way to continue traveling was to hold the high beam flash lever. According to Ford it is the automatic headlight controller and it cost 900 to repair. I almost crashed during a rain storm when the lights suddenly went off and unable to get them to come back on. Driving with high beams on is dangerous and having to hold the flash lever while driving causes a safety issue as well.

- N Ft Myers, FL, USA

problem #23

Sep 172010

Grand Marquis 8-cyl

  • 55,149 miles
The headlights will turn off intermittently. Always at night. This happens when the light switch is in the auto and manual positions. When the lights turn off, putting the light switch to either auto or manual on, does not turn the headlights back on. Only, after waiting for 20, 30, 40 or more seconds will the lights come on when operating the light switch. The has happened when the car is parked and while driving (city streets, freeway). This cycle of turning off and on has occurred when getting onto a freeway and repeats at intervals for 30 minutes or more. The problem was only observed by the Ford dealer technician when he could drive the auto home at night for two consecutive nights. It was determined that a lighting control module was at fault. The part number is 5W7Z-13C788-ac. The old part is not available.

- San Lorenzo, CA, USA

problem #22

Sep 182010

Grand Marquis

  • 71,017 miles

A D V E R T I S E M E N T S

We have a 2005 Mercury Grand Marquis with automatic headlamps. While driving on Sept 18,2010 in the evening I noticed dash light were on but it did not appear to have headlamps on. I tried manual switching and still no headlights. I was able to continue home when I found out high beams worked. 1st trip to dealer was possible loose pin. Lost headlights on the way home from dealer. Brought car back and headlights started working again. Dealer just called and said headlight module was bad and has to be replaced. One week wait because dealer said it is unusual. Checked on line and found a couple of hundred complaints of same exact problem and remedy. $750 plus. Could have been disastrous later in evening on the interstate at 70 mph. I am requesting old part from dealer thank you

- Hinesville, GA, USA

problem #21

Sep 072010

Grand Marquis

  • 98,000 miles
There are some things in a car that should just work right for the life of the car if nothing has happened to them┐and headlights that come on is one of those things. I have a 2005 Mercury Grand Marquis (I have owned Lincoln Mercury products for years) and while driving back from my daughter's house one night, my headlights went off. I was traveling 50 mph and there were no lights on the road. My interior lights were still on, but I suddenly could not see the road. Fortunately, there was no one behind me and I pulled over (and fortunately, there was a shoulder on that road). I flipped the light switch back and forth a few times and they came back on. I finished the drive home, wondering what in the world caused that. A week later, I was driving home on I-10 at 9:00 P.M. when suddenly, the lights went off again. This time I was traveling at 70 mph and was in the middle of a steady stream of traffic. I┐M alive to tell you about the rest of the trip home. I was in the middle lane and was sure that most of the cars in that ┐pack┐ had seen me before the lights went off. I let everyone pass me as I slowed down and quickly got into the right lane when there was a break in traffic. I got on the shoulder of the road going about 50 mph now and slowed down after I got on the shoulder, so I wouldn┐T be hit. This time I sat there counting my blessings for a while, then flicked the switch a few more times and they came back on. I got back out on the road and almost made it to my exit before it happened again. This time I was going slower so I was able to pull to the shoulder. I put on my emergency flashers and made it to my exit then cautiously home. The headlights came back on and went off three times during the rest of the ride home. My point in writing is to ask Ford Motor Company to reconsider its opinion that this problem should not be fixed by an official recall. I have read that there have been 3,064 complaints about this problem.

- Biloxi, MS, USA

problem #20

May 032010

Grand Marquis

  • 18,000 miles
The contact owns a 2005 Mercury Grand Marquis. The contact stated that while driving at night the headlights would not shut off. Usually within 5 minutes or so they would come back on. The vehicle was repaired in June 2010 by replacing the lighting module at her expense. The VIN was not available. The current and failure mileages were approximately 18,000.

- Summerfield , FL, USA

problem #19

Aug 272010

Grand Marquis

  • 32,675 miles
8/27/10 Chicago-Illinois 2005 Grand Marquis - headlights go off when driving. You hear a click and sometimes they come back on and sometimes they don't. extremely dangerous to be driving down the road in the dark and to have your headlights go out. The Ford dealership advised me that it was the lighting control module that was bad. They charged me $143.75 to tell me this, then they wanted another $930 to replace it. Even though I have an extended warranty, I was advised that this particular module is not covered. I am now only driving this vehicle in the day time.

- Bensenville, IL, USA

problem #18

Sep 222009

Grand Marquis

  • 12,000 miles
Trunk latch on key fob does not require as much pressure as say the button to unlock, lock, or panic(emergency). At the slightest swipe over the trunk icon the release is engaged, the trunk on this vehicle has been left open and unattended several times. This can cause loss to an occupant who may be traveling with valuables. When entering a passage on the freeway such as a tunnel, the exterior bright lights turn on by themselves. The reason we know is because the highbeam icon becomes illuminated to blue on the dash panel.

- Maple Grove , MN, USA

problem #17

Jul 132010

Grand Marquis

  • 77,279 miles
2005 Grand Marquis - headlights go off when driving. You hear a click and sometimes they come back on and sometimes they don't. extremely dangerous to be driving down the road in the dark and to have your headlights go out. The Ford dealership advised me that it was the lighting control module that was bad. They charged me $143.75 to tell me this, then they wanted another $930 to replace it. Even though I have an extended warranty, I was advised that this particular module is not covered. I am now only driving this vehicle in the day time.

- Hawkinsville, GA, USA

problem #16

Jul 012010

Grand Marquis

  • 79,000 miles
Headlights suddenly go off.

- Jacksonville, FL, USA

problem #15

Mar 182010

Grand Marquis

  • 107,000 miles
On the evening March 18,2010 I started my car..it was dark. I proceeded for about 1/2 mile at which time I entered the interstate I87.II was driving for 5-10 minutes when all of a sudden the headlights went out. I was in the middle lane, with cars passing on both sides. I managed to slow down and move to the shoulder.scary wasn't the word. I tried turning the headlight switch off/on. Nothing happened while II was working the switch, the lights came on..lights on, I started driving. Within 10 miles, the same thing happened. The lights went out. On off for the next 20 miles..home>>>>II figured out that I could have lights if I held the flasher bar on bright. Oncoming traffic didn't like the brights, but I had lights..temporary.. so the problem continues when driving in the dark. There seems to be no pattern..the lights will go out..then, hold the flasher bar for lights..I went on the internet and found 100's of other S with the similar problem. I called Ford and they are not doing nothing. What a serious incident looking to happen...

- Petersburgh, NY, USA

problem #14

Feb 122010

Grand Marquis 8-cyl

  • 50,000 miles
My 2005 Mercury Grand Marquis has automatic headlights which switch off leaving you driving in the dark. This has happened several times and when it does happen the lights do not work on manual and won't reset for several minutes. I am told through several forums that this is a lighting control module problem that Ford Motor Company is well aware of. I am also told the repair without additional cost of diagnosis and installation runs between $400 & $600 dollars. I feel this is a serious safety issue that Ford Motor Company is ignoring.

- Davenport, FL, USA

problem #13

Apr 122010

Grand Marquis 8-cyl

  • 74,000 miles
My wife was driving our 2005 Mercury Grand Marquis after dark and the low beam headlamps went out. Fortunately she was close to her destination and was able to navigate with the street lights. I don't want to think what may have happened on the interstate had she been heading home. Everything checks out fine except for the light control module. Dealership says this is a common problem and will cost about $500 for the part and $200 labor. We currently do not drive this car at night until we have enough money saved to get the repairs done. Someone is going to die because of this (if it already hasn't happened - we were fortunate).

- Cement City, MI, USA

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