Question about 2004 Mercury Grand Marquis

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2004 mer. grand marquis

Headlights will switch off by themselves.  happens when h/l switch is in auto or manual.  can get lights to work by holding turn signal back.  after varying amounts of time lights will work normally the cycle will repeat.  could this be a relay problem?  if so where is it located?

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  • fastandgo Oct 25, 2008

    when you pull back on the turn signal indicator both the hi and low beams are on.  looking in the owner's manual there is nothing listed as a "lighting relay".

  • Jim X Jan 10, 2009

    I have the same exact problem but to clarify the previous description both the high or low beams will cut out. Pulling back on the directional signal does consistently turn on the high beams as this bypasses the relay or connection that is intermittent.

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Ok i am going to assume by "holding the turn sinal back" that means the high beams are on. Now i believe that the grand marquis has 1 lo beam and 1 hi beam relay if they are rated at the same amperage you can swap em . The mercury i have has two locations under the hood and under the steering column to the left. In the car it is has a locking tab that you have to pull down to unlock it and it will swing out. In all honesty if you have 20 bucks and want to invest it i would suggest buying an repair guide either way good luck.

Posted on Oct 25, 2008

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Usually it's a case of the regular headlights not working while the high beams (brights) still work if you hold them on while driving, but if you have a 1999-2011 Mercury Marquis, Mercury Marauder, or Crown Victoria, and your regular headlights and or tail lights don't work it probably is your LCM that used to cost around $1,000 to repair.

The good news now is that 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 15 years/250,000 miles. THIS IS NOT A RECALL! They do not advertise this.

Your regular headlights must not work properly in order to get a new LCM on this new extended warranty. It must be done at a Ford Dealer and the fix is free. Call your local Ford Dealer and tell them you need to make an appointment because your headlights don't work and that Ford has extended your warranty on the LCM.

They may act like they don't know what you are talking about, so tell them it is the Customer Satisfaction Program 14N01. Have your car's Vin number ready as they will ask for it. You don't have to be the original owner. If they still act like they don't know what you are talking about ask to talk to the manager or tell them to call Ford Motor Company and ask them, or you can call Ford yourself.

We had our 2003 Marquis done at a Ford dealer in August of 2014 in Scottsdale, AZ but first they checked out our LCM first to make sure it didn't work. As soon as they found out it didn't work, they installed a new LCM for free under the new warranty called "Customer Satisfaction Program 14N01".

Posted on Aug 18, 2015

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1 Answer

1998 mercury grand marquis headlights


There's a l.c.m located by the gas pedal, just above it over the plastic cover.when this happens, slightly tap the module. If light come on then you need a new l.c.m (lighting control module)...very common concern eith this vehicle, unfortunately not cheap

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Headlights come on by remote and some times they dont. I tried using the switch on manual and sometime it works and sometimes not. Parking lights,directionals,dashall work fine.The only problem is the...


try checking connections to headlights make sure the are clean and fasten securly to bulb other than that i would check continuity on wires to see if any are broken or grounded out hope this helps

Sep 04, 2008 | 2004 Mercury Grand Marquis

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2002 Grand Marquis headlights won't turn off with switch, won't go out until vehicle is turned off


Might these be "driving lights"?
Cars with "driving lights" have lights that are supposed to stay on all the time the engine is running.
These lights not only look like headlights, in fact some cars even have the headlights themselves come on when the engine is running. Look as some more (several) 2002 Grand Marquis's and see if they are the same.
Be blessed.

Feb 05, 2013 | Mercury Grand Marquis Cars & Trucks

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Headlights don't work unless you hold high beams


Check the headlight Relay and/or fuses - should be in the fuse panel.
GL,
Td

Oct 01, 2012 | 2004 Mercury Grand Marquis

1 Answer

My headlights go off after a few minutes of driving?


Most likely the head light switch is bad. It does not happen a lot but know to. Once the switch warms up, the switch it self gets hot and shuts off the light.....

I hope this is a little help

Nov 30, 2010 | 2004 Mercury Grand Marquis

3 Answers

I have a 2004 Mercury Grand Marquis. The headlights randomly switch off, while the parking lights remain on. The fuses look good.


the headlight switch is most likely going bad, do you hear a clicking noise in headlight switch when they cut off by their self? if it was a fuse the parking lights would go out also. hope this helps!!

Sep 19, 2010 | 2004 Mercury Grand Marquis

1 Answer

I have a 2004 mercury grand marquis and the head lights intermitently will go out while driving at night. after a few minutes they will come back on. the car does have the auto position on the switch.


what you are experiencing is the head light switch itself is getting hot and the internal relays in the switch are seprateing you just need to change the switch also check the manual dimmer swicth under the column for sticking or malfunctioning

Jan 21, 2010 | 2004 Mercury Grand Marquis

3 Answers

I have a 93 Mercury Grand Marquis and the headlights randomly turn off and on, does anyone know how to solve this?


There are 3 components for the headlights in your dash. The headlight switch, the delay switch, and the autolamp light sensor. If you have the lights manually turned on, without the autolamp position on the switch being on, then the headlight switch is a simple off-on switch.
If the headlight switch is manually on and the lights are cutting out the problem is either the fusible links or bad contacts in the light switch.
If you are using the autolamp position on the light switch, this is a different circuit. The autolamp system needs the light sensor to work. If the light sensor is dangling under the tiny slots in the dash every bump you hit will shake it. Or it can be a broken filament in the light sensor. To test, just eliminate the circuit by using only the manual off-on side of your light switch.

A loose power wire to the light switch (or ground) will affect BOTH the manual and automatic settings. But if the manual setting always works, then its the automatic parts that are broken. The delay switch does not work until after the ignition is off so it can not be the problem while you are driving.

Dec 27, 2009 | 1993 Mercury Grand Marquis

4 Answers

2004 grand marquis headlights won't come on automatically or manually. sometimes they come on - sometimes not. putting them on high beams does not help. however - I can HOLD the high beam switch forward...


Just had my 2004 Grand Marquis HL fixed. They would go off after less then 5 mins and then come back on in less than 5 mins. Then repeat. ONLY The high beam Hold switch would work. It was the LCM (Light Control Module) found behind the Glove Box. $700 for the Dealer to fix.
15 Min job for anyone who can figure out
how to remove the Module.

Aug 17, 2008 | 2003 Mercury Grand Marquis

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