Headlight Switch problems of the 2005 Mercury Grand Marquis - part 2

The contact owns a 2005 Mercury Grand Marquis LS. The contact stated that while driving at various speeds the headlights would suddenly shut off and on an intermittently. In order to keep the lights on he had to hold continue holding the high beam switch, until he drove onto the emergency lane and restarted the vehicle. The vehicle was inspected by an independent mechanic who advised him that the failure may be caused by the light control module. The vehicle was not repaired. The manufacturer was notified and advised him that they would confirm whether or not there were any bulletins regarding the failure. The failure mileage was approximately 75,000. Updated 04/15/lj the consumers has since sold the vehicle. Updated 05/02/11.

I was driving down the raod at 70 mph and the headlights blinked off, all the lites went off, headlites, tailites, all. I turned the headlite switch on and off and nothing. I slowed and down and began to pull of the interstate and the lites blinked back on again. This occurred 3 more times on the way into work. I notified Ford, no assistance and the dealer replaced the lighting control module, stated they had seen a few of them. I saw a Chrysler had a problem and thought I should report mine. I notified Ford this was a safety item and they should issue a recall.

The contact owns a 2005 Mercury Grand Marquis. The contact stated that while driving approximately 30 mph, the headlights would intermittently turn off and back on. The vehicle was inspected by a independent mechanic who replaced the turn signal switch but the failure continued. The failure mileage was approximately 78,000.

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. 00 plus. Could have been disastrous later in evening on the interstate at 70 mph. I am requesting old part from dealer thank you.

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.

There are some things in a car that should just work right for the life of the car if nothing has happened to themand 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 daughters 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. Im 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 wouldnt 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.

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 . . .

Information redacted pursuant to the freedom of information act (foia), 5 u. S. C. 552(b)(6) I would like to report a serious safety issue with my 2005 Mercury marquis. The headlights go off after a few minutes. They will not come back on for at least 30 minutes. This is when the light switch is turned on. The other lights stay on (parking and taillights), but the headlights go off. I did a google search on this situation today, and learned that this is occurring on several year models of Mercury Grand Marquis and Ford victorias. The problem is described on the internet as a faulty circuit board in the lcm (light control module). I took my Mercury to a Ford/Mercury dealer today for a diagnostic test, which confirmed: "diag pin test isolated to erratic relay internal to lcm modu" to replace this part, I was quoted almost $800 by the dealer, installed (part price is $511). I called Ford/Mercury customer service today, 800-241-3673, and learned that there have been no recalls (tel. Call ref. [xxx]). The Ford representative gave me your website. This is a very serious problem, to be driving and have headlights suddenly go off, and remain off. It started approximately Feb. 15 and continues to present.

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.

The contact's company owns a 2005 Mercury Grand Marquis. While driving 35 mph at night, the headlights dim and do not illuminate again. A mechanic performed a diagnostic, which indicated that the headlight switch was faulty. The switch has been replaced numerous times. There is a defect investigation (number pe08066) for the faulty headlight switch. The failure mileage was 117,000.