Question about Mercury Grand Marquis

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My 2003 Grand Marquis has had the well known LCM problem. I went the eBay route and found a guy who puts beefed up relays in the lighting control module. I installed it and everything worked normal again. Now, from time to time I get the exact same symptoms as a bad LCM but can take the battery cable off, wait a second and replace and the problem is solved temporarily. There doesn't seem to be a set pattern, nothing I can contribute the fail to. Oh, my airbags are failing.......maybe that?

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6ya6ya
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Posted on Jan 02, 2017

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SOURCE: 1993 Mercury Grand Marquis

starter cylinoid

Posted on Jul 07, 2008

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myob247
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SOURCE: 2001 Mercury Grand Marquis hyper flashing on directional lamps

It would probably be easier and a better idea to just get the correct bulbs.

The use of the wrong bulb can cause the flasher to flash too fast or too slow. Turn signals on American cars use either a 1257 or a 1034 bulb, which are interchangeable. A 1257 bulb draws more current than a 1034, however and if it is used in place of a 1034, the flasher will flash faster. If a 1034 bulb is used in place of an 1157 bulb, it will flash slower.

Posted on Jul 27, 2008

  • 1 Answer

SOURCE: 2001 dodge stratus radio

I researched and found I needed to reseat or replace the IOD fuse. In my Dakota this is labled "Interior Lights". By pulling this fuse it allowed the radio to reset and everything came back. Hope it works !

Posted on Feb 15, 2009

  • 5 Answers

SOURCE: 2005 MERCURY GRAND MARQUIS GS LCM headlights

you can oder a cheap lcm from silverstatefordparts.com or sometimes u can just tap the lcm box and lights should turn back on.

Posted on Jul 10, 2010

  • 78 Answers

SOURCE: I have airbage light on 2003 Beetle. Dealer says

Hey,
take a look at www.airbagmodul.com

They're working in Airbag-Simulators and Occupancy Sensor-Simulators.

Regards

Gerrit

Posted on Aug 17, 2010

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1 Answer

On a 2003 Grand Marquis, which relay controls the hazard/turn signals on lcm


No relay , the lighting control module controls the flashing !

Jan 15, 2017 | 2003 Mercury Grand Marquis

1 Answer

The headlights don't work in my 2003 Mercury Marquis


First check the light bulbs if they are not the reason then, Welcome to the ford world, there is a thing called LCM (light control module in the grand marquis crown vics and lincoln town cars, sometime they go bad, your best bet before you look for replacing the LCM is to look for the headlight fuse and the relay, when you are sure it is not these two, then you can be sure its the LCM

Nov 19, 2014 | Mercury Cars & Trucks

1 Answer

I have a 2003 grand marquis headlights will not work but the flash the brights will. how to fix it


Probably the 'Lighting Control Module', or LCM. I had the same problem and understand it's common. I bought a rebuilt one off ebay . It's under the dash drivers side, can't miss it, disconnect the plug, loosen the clips (you'll see what I mean), slide it out (took a little force), pop the new one in. Tada!

Good luck.

Aug 11, 2011 | 2003 Mercury Grand Marquis

5 Answers

My headlights go out on my 2005 Grand Marquis GS 2005 after about 5-10 minutes I only have 48,000 miles on the car. Could it be the LCM, the multifunction switch or the light switch


sounds like Lighting Control Module. Uder dash above steering column. Guy on ebay fixes them for $100. $400 new.
type mercury grand marquis LCM or lighting control module onebay. Ginolena I think.

Dec 09, 2010 | 2005 Mercury Grand Marquis

1 Answer

Can I bypass the LCM to install a headlamp switch?


no LCM runs lots of stuff. Guy oin ebay fixes them for about $100 all the time. Type LCM repair.

Nov 14, 2010 | 2003 Mercury Grand Marquis

1 Answer

The low beams come on for a few minutes on start up and then go off. THis happens in the manual as well as the auto setting. After that they turn on for a few minutes and go back off for a while.


you need a LCM, lighting control module. expensive. $400/ known issue
located above brake pedal and steering column.
a guy in california on ebay fixes them for like $175 & exchange.

Oct 19, 2010 | 2003 Mercury Grand Marquis

4 Answers

Headlights come on for a 10 minutes and then turn off; dash lights, turn signal, passing signal all work etc.


There is actually a possible recall on this issue as it is a known problem with the LCM, or Lights Control Module. Go to the following site:
http://www.arfc.org/complaints/2003/mercury/grand_marquis/

This is one of the complaints:
HELLO, WE HAVE A 2003 MERCURY GRAND MARQUIS THAT HAS A PROBLEM WITH THE HEAD LIGHTS SHUTTING OFF AT RANDOM TIMES. NOTHING GAVE WARING TO THIS PROBLEM HAPPENING, WE BOUGHT THE CAR USED, AND WAS JUST FINE FOR A YEAR, THEN ALL OF A SUDDEN ONE DAY THE HEADLIGHTS JUST GO OUT. THE FIRST TIME IT HAPPENED WAS ABOUT 6 MONTHS AGO(3-1-10). NOW EVERYTIME IT IS DRIVEN WITH THE HEADLIGHTS ON, IT IS GUARANTEED TO HAPPEN AT LEAST ONCE AND SOMETIMES UP TO 5 TIMES JUST IN 3 MILES OF DRIVING ON MY WIFES WAY HOME FROM WORK. THE ONLY WAY TO GET THE LIGHTS BACK ON AFTER THEY GO OUT IS TO PULL OVER TO THE SIDE OF THE ROAD, SHUT THE CAR OFF, LET SIT FOR A FEW MIN, THEN START AND THEY WORK AGAIN FOR A BIT. THIS IS OVERALL VERY DANGEROUS AND SUPRISING THAT WE HAVE NOT BEEN IN AN ACCIDENT OR RECIEVED A TICKET YET! I AM A ACTIVE MEMBER ON A CROWN VICTORIA FORUM, AND WITH LITTLE SEACHING ON THAT SITE OR GOOGLE YOU WILL SEE TONS OF REPORTS OF THIS BEING A VERY COMMON PROBLEM ON THE 2003-2005 CROWN VICTORIA, GRAND MARQUIS, AND MERCURY MARAUDER. WITH THE HELP OF OTHER MEBERS ON THAT FORUM IT WAS FOUND TO BE A FAULTY LCM(LIGHTING CONTROL MODULE) WHICH HAS A PROBLEM WITH OVERHEATING LIGHTING RELAYS. THE ONLY WAY TO REMEDY THIS PROBLEM IS TO PURCHAS A NEW LCM FOR ANYWHERE BETWEEN $250 AND $600 WITH NO GUARANTEE HOW LONG THAT PART WILL LAST. I ACTUALLY PURCHASED A NEW ONE TODAY. VERY EXPENSIVE FIX JUST FOR THE USE OF HEADLIGHTS, BUT I VALUE MY FAMILIES SAFETY MORE. I WILL BE KEEPING MY OLD LCM TO POSSIBLY HAVE IT REPAIRED FOR WHEN MY NEW PART FAILS AGAIN. THANKS SO MUCH.

Aug 10, 2010 | 2003 Mercury Grand Marquis

1 Answer

HI, I HAVE A 99 GRAND MARQUIS WITH LIGHTING PROBLEMS THAT DRAINS BATTERY.AT FIRST THE INTERIOR LIGHTS CAME ON AT ANY TIME.I REMOVED ALL INTERIOR BULBS.NOW I AM SHOWING A SHORT IN FUSE 11 IN HI-AMP FUSE...


the LCM is under the dash just above the steering column. It is $400. Get one on ebay only for your year and model. others won't work.

pleae rate

SECTION 419-10: Multifunction Electronic Control Modules 1999 Crown Victoria/Grand Marquis Workshop Manual
REMOVAL AND INSTALLATION Module —Lighting Control (LCM) Removal
  1. sxa~us~en~file=ani_caut.gif~gen~ref.gif CAUTION: Prior to removal of module, it is necessary to upload module configuration information to New Generation STAR (NGS) Tester. This information needs to be downloaded into the new module once installed. For additional information; refer to Section 418-01 .
    sxa~us~en~file=ani_caut.gif~gen~ref.gif CAUTION: Electronic modules are sensitive to electrical charges. If exposed to these charges, damage may result.
    Disconnect the battery ground cable.
  1. Remove the LH instrument panel lower insulator.
    1. Remove the pin-type retainers.
    1. Disconnect the courtesy lamp.
    1. Remove the LH instrument panel insulator.
3685af3.gif
  1. Position the LCM aside.
    1. Remove the screws.
    1. Release the locking tab.
    1. Position the LCM aside.
c558a59.gif
  1. Remove the LCM.
    1. Disconnect the electrical connectors.
    1. Remove the LCM.

Nov 19, 2009 | 1999 Mercury Grand Marquis

7 Answers

Headlights cut out after being on 10 to 15 minutes


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.

Oct 02, 2008 | 2003 Mercury Grand Marquis

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