Question about 2007 Mercury Grand Marquis GS Sedan

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2001 Mercury Grand Marquis hyper flashing on directional lamps

I'm told the flasher in this case is built-in the LCM or Lighting Control Module's board. Since the flasher can not be replaced, how can the diode that senses change in bulbs resistance, can be disabled?
Thanks,

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  • Anonymous Apr 08, 2009

    My 2003 GM has nearly the same problem. 2 mnths ago right side flasher going fast yet no bulb burnt.. could I have a bulb that the resistance changed on? How do I know which one?

  • Briankos Apr 08, 2009

    my '03 GM flasher flashes faster on the drivers side, yet no bulb is burnt. Does this mean I have a weak bulb? How to find the one.
    Thanks

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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

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2 Answers

Iwhere is the turn signal flasher located


  1. 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 Module Configuration. Ignore numbering on left of page


  2. There isn't a flasher...It is a module called the LCM ( Lighting Control module)...It needs to be replaced and requires a scan tool...Not a backyard project...




  3. 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.

iwhere-turn-signal-flasher-located-wtik1u3pjfqjepqdinj1lpkj-5-0.gif
  1. Position the LCM aside.
    1. Remove the screws.
    1. Release the locking tab.
    1. Position the LCM aside.

iwhere-turn-signal-flasher-located-wtik1u3pjfqjepqdinj1lpkj-5-2.gif
  1. Remove the LCM.
    1. Disconnect the electrical connectors.
    1. Remove the LCM.

iwhere-turn-signal-flasher-located-wtik1u3pjfqjepqdinj1lpkj-5-5.gif saailer

Jun 19, 2015 | 2000 Mercury Grand Marquis

2 Answers

How do you replace the Headlight control module on Mercury Grand Marquis


The lcm is mounted in the same location in all crown vics. It's under the dash, above the gas pedal in between the climate controls and steering column. If you're having trouble locating it, engage the hazard flashers and listen to where the source of the clicking sound is coming from. You can also place your keys in the ignition and open the drivers door and track down the module by listening to where the warning buzzer tone is coming from.
REMOVAL AND INSTALLATION
  1. Open hood. Disconnect battery ground cable .
  2. Locate lighting control module above accelerator pedal.
  3. Disconnect bottom two electrical connectors from lighting control module.
  4. Remove two screws retaining LCM to bracket and unclip from bracket.
  5. Remove lighting control module from bracket and disconnect remaining electrical connector.
  6. To install, reverse Removal procedure. Check lighting control module for proper operation.
We do Repair and Exchange LCM's with Lifetime Warranty.
Go to ModuleRepairPro dot com

Dec 07, 2013 | 2005 Mercury Grand Marquis

1 Answer

I am having trouble with my 1997 Grand Marquis turn signal-hazard flasher lights I am told I will need to repace the lighting control module at a cost of $750.00 does that sound right to you?


what exactly does your turn signal/flasher light do/not do?
going through a repair shop, I wouldnt doubt they would charge that much!
Good luck

Jan 21, 2011 | 1997 Mercury Grand Marquis

1 Answer

Where is my fuse for my turn signal


Circuit Protection Fuses/ Circuit Breakers Flashers are serviced as part of the lighting control module.
(Special police packages have flasher units and relays in the trunk relay center)
The Lighting Control Module (LCM) contains controls for both interior and exterior lighting, back lighting, the battery saver and various warning chimes.
The LCM eliminates the electronic interference and heat associated with the thermo-electric devices (bi-metallic and other mechanical flashers) used previously. The LCM is a microprocessor module that commands several lighting subsystems. It responds to electrical input signals from the vehicles various switches, sensors, and external modules.
LCM subsystem functions include:
  • Headlamps with auto-lamps
  • Turn signal lamps/hazard flasher lamps
  • Cornering lamps
  • Parking lamps
  • Courtesy lamps
  • Demand lamps
  • Battery saver
  • Backlighting
Interfacing with the Driver Door Module (DDM) via Standard Corporate Protocol (SCP) for illuminated entry
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Jul 21, 2010 | 2000 Mercury Grand Marquis

2 Answers

I have a 1998 grand Marquis and the turn signal as well as the emergency flashers do not work. all fuses are good


Check in the passenger fuse panel, its possible that you need replaced the "flashers"...

For details review the Grand Marquis Owners Manual. (page 95 and next for FUSES)

Hope this help (remember rated this post).

May 19, 2010 | 1998 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

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.

9a18f6a.gif

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.
2baa00d.gif
  1. Position the LCM aside.
    1. Remove the screws.
    1. Release the locking tab.
b8e3948.gif
  1. Disconnect the electrical connectors and remove the LCM.
ecda3be.gif

Apr 20, 2009 | 2003 Mercury Grand Marquis

3 Answers

Turn signal don't work or the flashers?


If you still have flasher problems, I read on Google to spray WD-40 down in and around the hazzard flasher button, then press it up and down several times...and BINGO...all flashers and signals worked again....just had some dirt and dust in the wiring....

Jan 24, 2009 | 1997 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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