Question about 2003 Mercury Grand Marquis

7 Answers

Headlights cut out after being on 10 to 15 minutes

The headlights cut out after 10 to 15 minutes. I suspect a heat build up problem. The 4 ways work; the tail lights work; the marker lights work; the flash to pass switch works; but the cornering do not work. I can not get them back on manually. The wiring diagrams show a lighting control module from the auto sensor and light switch. the flash to pass by passes the lighting control module. The diagram does not show a relay in the circuit. I suspect the lighting control module is heat sensitive, but I can't find where this is located or a trouble shooting procedure to test or check it. Can you help? Dave Lemon

Posted by on

  • 11 more comments 
  • Anonymous Oct 05, 2008

    I have the same identical problem on my 2004 Grand Marquis. The lights cut out after 10 minutes or so and they won't come on either in manual or automatic mode. Shutting the engine off and then restarting sometimes cures the problem but only temporarily. I'm wondering if this might be a recall issue?

  • DrMark504 Dec 21, 2008

    After 20 minutes and with the heat on, Headlights start to flicker then cut out. I hear what sounds like a relay chattering somewhere behind the speedometer. The chattering is in timing with the flickering. Replaced head light switch recently.
    Mark


  • helmutlasser Jan 28, 2009

    Same deal. Replaced light switch $97 from NAPA. Did not fix it. Others have said to replace multifunction turn signal but didn't since other posts said it didn't fix it. I read somewhere that there is a loose circuit or solder point in the light control module or body control module as listed in this forum. Anyone know where it is or how to trouble shoot one?

  • Anonymous Jan 30, 2009

    I am experiencing the exact same problem as davelemon7. Can anyone please help me? Thanks

  • Anonymous Mar 29, 2009

    I have the same problem. Lights go off (headlights only) then I'll hear a "click" and they come back on. Sometimes they stay on, other times they go out within 10 minutes of start up. On long trips 1/2 hour or longer they'll cycle on/off several times. I only hear the click when they come back on.

  • lucent1 Apr 01, 2009

    2004 grand marquis - headlights go out after a few minutes of being on. I wait 2 or 3 minutes and I hear a click and they go back on. Sometimes they stay on, sometimes they go out/on again a couple times.

  • Anonymous May 04, 2009

    I have the same problem except now my lights won't even come on at all. I took it in for inspection and Ford said the lighting control module and brake switch need to be replaced.

  • eldrid_hill May 12, 2009

    I HAVE THE SAME PROBLEM BUT NOONE HAS GIVEN ME ANY ADVICE. IT MAKES MY DASH AND INTERIOR LIGHTS STOP WORKING. I TURN THEM OFF THEN BACK ON TO MAKE THEM WORK BUT THATS JUST TEMPORARY

  • cyclinfast May 18, 2009

    yup - headlights come on, then shut off soon after. i think the clicking behind the dash is relay (?) for the auto lamp feature. sometimes that will click and the lights will come on. i took apart my light switch and checked everything with the multimeter and all the connections are good. there is evidence of heat in the wire harness connector to the light switch. so how do you get to the autolamp controller so i can check that out?

  • Anonymous May 19, 2009

    I have a 2003 Mercury Grand Marquis that I bought new 6 years ago, My Marquis has the same exact problem.

    The weak link in the 03 headlight system is the Lighting Control Module.

    I never in a million years would have believe that Motorcraft would have installed an item with such an inherent problem especially considering that if the LCM goes out while you are driving you can be in the dark at 70 MPH. I have checked everything in the system and have even pulled the LCM out of the vehile to see if there was a bad pin on one of the electrical connectors, didn't find anything wrong. I have only found one e-store that sells them $313.00 or 499.00 from the dealer, auto part stores don't carry them. Right now I have the interior panel under the stering colume removed and whenever my lights go out I just hit the LCM located right above my gas pedal and my lights come back on... I was thinking about rigging up a set of pulleys with a hammer attached to the end, what you laugh I put as much thought into it at Ford did in designing that LCM. George

  • shaik ahmed Sep 02, 2013

    dear friend i had also same problem with my 1991 grand marquis my head light was flicker so replace the headlight switch and auto lamp switch now it is ok thank you

  • Gayle
    Gayle Aug 28, 2014

    If you have a 1999-2011 Mercury Marquis, Mercury Marauder, or Crown Victoria, and your headlights and or tail lights don\'t work, Ford just finally extended the warranty on your LCM (Lighting Control Module) for free - both parts and labor and will install a new one for free! Ford has extended the warranty to 15yrs/250,000. Must be done at Ford and the fix is free. Call your local Ford Dealer and tell them you need to make an appointment because your lights don\'t work and Ford has extended your warranty on the LCM. Tell them it is the Customer Satisfaction Program 14N01. Have your Vin number ready as they will ask for it. If they act ****** ask to talk to the manager or tell them to call Ford Motor Company and ask them or you can call Ford yourself. We just had ours done on 8-12-14 in Scottsdale, AZ. If you have a 99 you better get there before Oct. 14th, 2014 as it is a 15 year warranty.

  • Gayle
    Gayle Aug 28, 2014

    Ford will test it for free under their extended warranty program # 14N01.

×

7 Answers

  • Level 1:

    An expert who has achieved level 1.

    Mayor:

    An expert whose answer gotĀ voted for 2 times.

  • Contributor
  • 1 Answer

I had the same exact problem. I found that I could make the lights come on by pushing on the top connector on the front side of the lighting control module (LCM). I pulled the connector off, cleaned it and put it back together with some dielectric grease. Only time will tell if I fixed it. On my car, it would only have problems after the headlights had been on for about 3 hours; kind of hard to re-create.

Posted on Mar 24, 2009

  • Level 1:

    An expert who has achieved level 1.

  • Contributor
  • 1 Answer

Hello, I would take a close look at the wiring harness attached to the back of the headlight switch.  When my '94 started doing the headlight flicker thing, we replaced the turn signal mech and pulled the headlight switch out, and sure enough, one of the wires were completely burnt.  A quick switch of the wiring harness and a new headlight switch worked beautifully.
That fixed my flicker problem 100%.

Posted on May 17, 2009

  • Level 1:

    An expert who has achieved level 1.

  • Contributor
  • 1 Answer

Underneath the driver side of the dash is the LCM (lighting control module). it is a rectangle shaped module located directly above the DLC (data link connector). there is a known concern of a loose solder joint internal to the module. there are 3 connectors on the back side of the module and typically when the concern is present you can flex the top connector and the headlamps will come back on. 95% of these that i have seen have required the replacement of the LCM.

Posted on Feb 28, 2009

  • Gayle
    Gayle Aug 28, 2014

    If you have a 1999-2011 Mercury Marquis, Mercury Marauder, or Crown Victoria, and your headlights and or tail lights don\'t work, Ford just finally extended the warranty on your LCM (Lighting Control Module) for free - both parts and labor and will install a new one for free! Ford has extended the warranty to 15yrs/250,000. Must be done at Ford and the fix is free. Call your local Ford Dealer and tell them you need to make an appointment because your lights don\'t work and Ford has extended your warranty on the LCM. Tell them it is the Customer Satisfaction Program 14N01. Have your Vin number ready as they will ask for it. If they act ****** ask to talk to the manager or tell them to call Ford Motor Company and ask them or you can call Ford yourself. We just had ours done on 8-12-14 in Scottsdale, AZ. If you have a 99 you better get there before Oct. 14th, 2014 as it is a 15 year warranty.

×

  • Level 2:

    An expert who has achieved level 2 by getting 100 points

    MVP:

    An expert that gotĀ 5 achievements.

    Novelist:

    An expert who has written 50 answers of more than 400 characters.

    Scholar:

    An expert who has written 20 answers of more than 400 characters.

  • Mercury Expert
  • 93 Answers

If you have a 1999-2011 Mercury Marquis, Mercury Marauder, or Crown Victoria, and your headlights and or tail lights don\'t work, Ford just finally extended the warranty on your LCM (Lighting Control Module) for free - both parts and labor and will install a new one for free! Ford has extended the warranty to 15yrs/250,000. Must be done at Ford and the fix is free. Call your local Ford Dealer and tell them you need to make an appointment because your lights don\'t work and Ford has extended your warranty on the LCM. Tell them it is the Customer Satisfaction Program 14N01. Have your Vin number ready as they will ask for it. If they act ****** ask to talk to the manager or tell them to call Ford Motor Company and ask them or you can call Ford yourself. We just had ours done on 8-12-14 in Scottsdale, AZ. If you have a 99 you better get there before Oct. 14th, 2014 as it is a 15 year warranty.

Posted on Aug 28, 2014

  • Level 1:

    An expert who has achieved level 1.

  • Contributor
  • 1 Answer

Where is the fuse box located on my 1989 grand marquis?

Posted on Feb 10, 2009

  • Level 1:

    An expert who has achieved level 1.

  • Contributor
  • 1 Answer

My 97 Grand Marquis low beam not operating

Posted on May 20, 2009

  • LFalcon1969 May 20, 2009

    my grand marquis low beam not operating

×

  • Level 1:

    An expert who has achieved level 1.

  • Contributor
  • 1 Answer

MY HEADLIGHTS GO OFF AND ON AFTER ABOUT 20 MINUTES AND KEEP DOING THIS UNTIL I SHUT THEM OFF FOR A LITTLE BIT. IT IS A 1995 GRAND MARQUIS

Posted on Nov 05, 2008

1 Suggested Answer

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi,
a 6ya expert can help you resolve that issue over the phone in a minute or two.
best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
goodluck!

Posted on Jan 02, 2017

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

1 Answer

Both front indicators have stopped working but the bulbs tested fine, I have a tester but unsure on what to be checking for, any ideas anyone? Thanks


THE CADDY FRONT HEADLIGHTS SUFFER FROM BAD CONTACT AT THE INDICATORS.THE CONTACTS AT THE HEADLIGHTS SIDE DO NOT MAKE GOOD CONTACT AND AS A RESULT BCM DOES NOT SEND VOLTAGE.THE CHEAPEST WAY TO REPAIR IT IS TO MAKE A SMALL MODIFICATION AT THE HEADLIGHTS.CUT THE TWO BLACK CABLES GOING AT THE CONNECTOR INSIDE THE HEADLIGHT WHERE THE SOCKET OF THE LIGHT BULB SITS.DRILL 2 HOLES AT THE SOCKET AND DIRECT THE TWO CABLES U CUT THROUGH THE SOCKET AT THE EXACT POINT OF THE CONTACTS AT THE SOCKET.SOLDER THE WIRES AND U ARE GOOD TO GO.

Mar 29, 2015 | 2006 Volkswagen Caddy 1.9

1 Answer

Headlights flicker when going down the road


I would suspect that the headlight switch has a burned connector, pull it out and inspect it. If the connector appears heat damaged or melted replace the connector and the switch, not just one part, both. Do not crimp connect the new connector on, solder it and use shrink tubing to seal the solder joints.

Sep 14, 2012 | 1997 Pontiac Firebird

1 Answer

My 1999 Dodge Ram 1500 is blowing fuses. Whenever I cut the headligghts on a fuse blows and my tail lihts, marker lights and dash lights no longer work. I have replaced the fuse 13 times so far. I havent...


I suspect wear and tear has shorted a wire somewhere. The question is where is the problem?
A little deductive work can go a long ways.
If the running lights work fine but it blows when the headlights come on then it is in the wires going to the headlights.
Try this. Get someone to help you by watching the headlights when you turn them on with a next size larger fuse. See if your helper notices one of the headlights being dimmer then another. If he does then it is "Likely" that that particular headlight circuit is the culprit.
Start tracing the wiring back from that headlight till you find the problem.
Note: You may have a bad headlight switch as well. as in it could be shorting out inside when you flip the beams on. If neither light comes on at all or merely flicker then Id be very suspicious of the switch.
If you are the only owner of this vehicle then you know that nobody has been hacking the wiring. But if you bought it you never know if there might have been a splice poorly made by somebody else that is now shorting out.
Hope you find it fast. wiring problems are a real headache.

Apr 14, 2010 | Dodge Ram 1500 Cars & Trucks

1 Answer

My headlights will not light up. the fuses in the


it's likely the headlight bulbs themselves need replacement.if high beams work but not low beams,suspect bulbs.if neither work,suspect switch,then wiring.

Oct 18, 2009 | 2004 Volvo XC90

1 Answer

I have 98 eddie bauer ford explorer with headlight problems. Headlights work when first starting up and then about ten minutes into drive the dash lights flicker and then headlights go out. If i pull the...


The headlamp switch will cause the lamps to turn off. The switch heats up and turns the headlamps off. It will cool down and work for about 10 minutes and cut out,

Oct 06, 2009 | 1998 Ford Explorer

2 Answers

On my 19194 chevy caprice the headlights will cut off all of a sudden


Check your headlight fuses, a relay may be on its way out.
Hope this helps.
Cheers

Apr 08, 2009 | 1994 Chevrolet Caprice

4 Answers

Why does my 1997 dodge dakota's headlights flicker on and off.


my 99 dakota has gone thru 3 switches. I have found that if they do it now ---i take off the instrument guard ---no screws ---
unscrew the headlamp switch ----and spray all movable parts with wd-40 it fixes it for about 3 months. my theory is the switch gets wet from AC condensation and builds up a film that the switch arm just rides on. hope this helps.

Jan 25, 2009 | 1997 Dodge Dakota

3 Answers

Headlights cut off while driving


If it is truly a ground problem you should be able to do the following.

NOTE* Sometimes finding the root of a ground problem in a wiring harness can be very time consuming and also drive you nuts.

First you need to establish if it is indeed a ground problem.
Check your fuses and make sure that none of them are bad or loose.
Look at the back of the headlight switch and determine if the connection is solid.
Do the same with each headlight. If you find a dirty connector then clean it gently and re-connect it.
Try the headlights again... If the same thing happens continue.

IF YOU ARE NOT MECHANICALLY INCLINED, FIND SOMEONE WHO IS FOR THE NEXT PART!

On the headlight connector there are usually 3 wires. 1 low beam, 1 high beam, and 1 ground,
Find the ground wire from the headlights and provide a solid temporary ground by adding an additional
wire into the ground socket. DO NOT CUT EXISTING ELECTRICAL WIRES ON YOUR CAR!!! Get a length of Electrical wire and strip off about 1 inch of the coating from each end. Find which socket is the ground, and slip the new wire into the socket with the bulb.
Take the other end of the wire and fasten it to a grounded area, "something made of steel, like the frame or part of the engine. NOT ALUMINUM...

Try the headlights again... If it works ok then you do have a ground problem.
The options now are to either secure everything down "as is" and consider it fixed, or, take it to a shop and have them fix the ground the way it should be fixed.

This is only ONE way to diagnose a ground problem but NOT the only one.

If it does not work then it is something else other than a ground, like a switch.



Nov 22, 2008 | 1985 Jeep CJ7

1 Answer

Headlight self-actualization problem


Hi,

Initially, the headlight relay unit would be suspect (likely). I would suspect corrosion on the terminal connector of the fuse box/relay bank (most likely) affecting the headlight. When damp/cold, the corrosion would be triggering the relays to engaged position. The steering column switch would be the least likely since as you posted headlight still on even if that switch is disconnected. the same may also hold true for the signal flasher. A good approach would be to work your way backwards from the headlight, fuse, relay, switch assembly using a DVM measuring/checking for +12V presence.

Hope this be of initial help/idea. Pls post back how things turned up or should you need additional information.

Good luck and kind regards.

Thank you for using FixYa.

Jun 19, 2008 | 1997 Toyota 4Runner

Not finding what you are looking for?
2003 Mercury Grand Marquis Logo

2,222 people viewed this question

Ask a Question

Usually answered in minutes!

Top Mercury Experts

yadayada
yadayada

Level 3 Expert

70347 Answers

Ron Lankford

Level 3 Expert

5386 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

22041 Answers

Are you a Mercury Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...