Question about 2003 Mercury Grand Marquis

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Proceedure for removing lcm from a 2003 mercury

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  • Mercury Master
  • 4,369 Answers

Under dash above brake pedal. you can fish it out. remove noise cover (fiber).

guy on eaby fixes them. type LCM repair on search.

tascafordparts.com sells new for 35% off.

let me know if you need steps.

Posted on Dec 03, 2010

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Saemery
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SOURCE: where is my lcm located

Hi, welcome to FixYa.com my name is Shawn and I will be answering your question.

The Lighting Control Modual is located under the dash on the drivers side near the center.

I hope my assistance helped you and resolved your concern, if you need further assistance please ask.

Posted on Aug 09, 2011

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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

My headlights won't work on my 2003 Lincoln


Problem is most likely the LCM (light control module). This is a common problem for Ford-Lincoln-Mercury vehicles 2003-2005. The issue is faulty relays installed on circuit board of LCM. These are quite costly if purchased from dealerships. There are several businesses on the internet that can repair LCMs at less than half the cost. Good luck. Ron @ Speed-O-Repair.

Aug 27, 2014 | Cars & Trucks

1 Answer

THERE IS A RECALL FINALLY ON THE 2003 MERCURY GRAND MARQUIS "LIGHTING CONTROL MODULE" AS OF 4/28/2014. CALL YOUR LOCAL FORD DEALER AND THEY WILL REPLACE FOR FREE!!


If the high and low beams do not come on, yet the lights do energize when you hold the "flash to pass" lever towards you, then it probably is the LCM (Light Control Module...) And there is now VERY GOOD NEWS!!! Ford just started fixing them for FREE!!! (Ref: Ford Customer Satisfaction Program 14N01) Ford/Lincoln/Mercury has finally decided to deal with the rat-nasty LCM's they have been putting out. I just got the letter on this from Ford last week. Without starting a safety recall, (as they should,) they are extending the warranty on the LCM (based upon VIN number,) to 15 years or 250,000 miles whichever comes first. AND if you paid earlier for this replacement and have the receipt, they will REIMBURSE you for the repair provided it was done before the notice came out. The window to be reimbursed for an earlier repair looks to be between April 1st, 2014 to October 31st, 2014. This window also applies if your car is under 15 years, yet has exceeded 250,000 miles. Ford's LCM replacement is completely without charge for parts and labor. Retail owners should have their VIN number handy and call the local Ford/Lincoln/Mercury dealership for an appointment. They say it should take a half a day yet could be longer due to dealer "service scheduling requirements." They will only replace LCM's that do not work, but mine lasted 10 years before it started acting up. This gives Ford a way to show concern, without really dealing with the 1000's of LCM's that will fail after this window closes in the future. Ford only "invented" their LCM after their service departments were losing money on a system that smaller repair shops could easily fix. Nice to have a little black box that they could unplug and swap out so they could charge $800-$1000 in parts and labor then repair at the factory with three $10 relays. Anyway if you have any questions about this "un- recall" you may contact the Ford Customer Relationship (I'm in a "relationship?") Center at 1 (866) 436-7332 either they or the dealer can tell if your vehicle is covered if you have the VIN number handy. IN THE MEANTIME. Should you need to get granny to the hospital at night, you can try this AT YOUR OWN RISK. The LCM on my 2003 is located about 18" directly above the gas pedal under the back of the dash... Turn on the lights and give the LCM a tap with your foot. This will often engage the cheap Ford relays and the lights will come on. But you should make that appointment with the dealer before everybody starts fighting for access to the same part. I also don't know if Ford would be willing to call someone a liar if he claimed his headlights stopped working because he thought it is just a matter of time before the lousy relays in his LCM failed, since this is intermittent, and asked for an LCM replacement under this warranty as well. That is why this should be a RECALL, and not just some bean-counter's way of slithering out from all of the angry customers that demand action today. My Grand Marquis is really a fantastic car, but having to drive 50 miles home on narrow country roads with one terrified hand while holding the "flash to pass" arm with the other, and risking my life because Ford played it cheap with some relays on their flagship chassis for a decade or more, really makes you wonder what they were thinking. Remember: You have to take your car to a DEALERSHIP to get this fixed for free under warranty. DO NOT TAKE IT TO A PRIVATE REPAIR SHOP unless you just want to throw your money away!

Apr 29, 2014 | 2003 Mercury Grand Marquis

1 Answer

2003 lincoln towncar low beam headlights dont work


Ford just came out (in April 2014) with an extended warranty for headlights that don't work on the Mercury Grand Marquis. It is a 15 year/250,000 mile warranty and it is called Customer Satisfaction # 14N01. They will replace the LCM (Lighting Control Module for free. Call your Ford dealer to see if they have the same kind of extended warranty program for the Lincoln Town car LCM, or call Ford Motor Company. It's worth a try.

Jun 18, 2012 | 2003 Lincoln Town Car

1 Answer

Where is my lcm located on my 2003 mercury grand marquis ls?


Hi, welcome to FixYa.com my name is Shawn and I will be answering your question.

The Lighting Control Modual is located under the dash on the drivers side near the center.

I hope my assistance helped you and resolved your concern, if you need further assistance please ask.

Aug 08, 2011 | 2003 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

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

2 Answers

Low beam dont work,2003 crown vic


It may also be a bad high/low beam switch.

Jul 09, 2009 | 2003 Mercury Grand Marquis

1 Answer

Lights on 2000 Mercury Grand marquis will suddenly go out while


please rate as solved if this fixes your issue. Let me know too.

I believe you have a bad LCM, Lighting Control Module. Or, the connectors to it have corrosion maybe. The module is above the brake pedal. It is very expensive. You can buy one at discount from tascafordparts.com. Sometimes, ebay has one too. But, you need one for your year car. Match the part number on your LCM.

Here's how to get it out.

SECTION 419-10: Multifunction Electronic Control Modules 2000 Crown Victoria/Grand Marquis Workshop Manual
REMOVAL AND INSTALLATION Module —Lighting Control (LCM) Removal
  1. sya~us~en~file=ani_caut.gif~gen~ref.gif CAUTION: Prior to removal of module, it is necessary to upload module configuration information to a scan tool. This information needs to be downloaded into the new module once installed. For additional information; refer to Section 418-01 . (I replaced one without doing any programming, so I don't think this applies).

  1. sya~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.
  1. Position the LCM aside.
    1. Remove the screws.
    1. Release the locking tab.
    1. Position the LCM aside.
  1. Remove the LCM.
    1. Disconnect the electrical connectors.
    1. Remove the LCM.

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Jun 03, 2009 | 2000 Mercury Grand Marquis

1 Answer

Headlights won't come on, now car won't start.


It is definitely the Lighting Control Module. Just fixed one for a friend. It has internal printed circuit board failure.
It is easy repair but it is expensive. New are 500. Controls much more than lights. Alarm, air bag, door key pad, etc.

You need to have correct part for 2003. tascafordparts,com has the for about $250.

It's just above brake pedal. remove the sond panel. The module will come out without removing other components.

Lighting Control Module (LCM)
The LCM eliminates the electronic interference and heat associated with the thermoelectric devices used previously. The LCM is a microprocessor- based module that controls several vehicle subsystems. It responds to electrical input signals from various switches, sensors, and external modules.
LCM exterior lighting subsystem functions include:
  • headlamps with autolamps (if equipped)
  • turn signal lamps/hazard flasher lamps
  • cornering lamps
  • parking lamps
  • battery saver
Principles of Operation
The lighting control module (LCM) is a microprocessor-based module that controls several vehicle subsystems. The LCM responds to electrical input signals from various switches, sensors, and external modules. The LCM is located under the LH side of the instrument panel. Subsystem functions of the LCM include headlamps with autolamps, turn signal lamps/hazard flasher lamps, cornering lamps, parking lamps, courtesy lamps, demand lamps, battery saver and control backlighting.
Module —Lighting Control (LCM) Removal and Installation

  1. Remove the LH instrument panel lower insulator.
    1. Remove the pin-type retainers.
    1. Disconnect the courtesy lamp.
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  1. Position the LCM aside.
    1. Remove the screws.
    1. Release the locking tab.
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  1. Disconnect the electrical connectors and remove the LCM.
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Apr 20, 2009 | 2003 Mercury Grand Marquis

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