Question about 1994 Mercury Grand Marquis

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Grand marquis headlight switch

Where is the headlamp fuse located

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  • 79 Answers

Should Be Under Dash driver side

Posted on Apr 24, 2013


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Posted on Jan 02, 2017

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SOURCE: 2004 mer. grand marquis

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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SOURCE: Location of blower motor switch resistor on 2004 Grand Marquis

The blower speed controller is located under the hood on the right or passenger side on the heater housing just to the side of the heater hoses near the very back of the right cylinder head.
Yes that would cause the concern you are having.

Posted on Feb 05, 2009

  • 1 Answer

SOURCE: headlights constantly go on and off, all other

i had this problem on my 2004 and it was the headlight module when it gets hot it turns out, and comes back on when it cools off

Posted on Aug 11, 2009

  • 83 Answers

SOURCE: 2000 grand marquis cruise control not working

Have seen this problem before. You need to look under dash at brake pedal and find a blue switch with plunger contacting pedal, disconnect connector and jump with a peice of wire and drive to see if cruise works and if it does replace deactivation switch this should get you going.

Posted on Aug 26, 2009

  • 7353 Answers

SOURCE: location of headlight relay on 1993 mercury grand

that is caused by a "circuit breaker" not a relay. when it starts flashing, carefully go over the harness from the firewall to the rf headlamp, there is a short somewhere.

Posted on Oct 15, 2009

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2005 merc grand marquis Headlights keep blowing a fuse

Does your Grand Marquis have head lamps with auto lamps ? Which fuse keeps blowing ? Could be a shorted LCM - lighting control module ?

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..

Visual Inspection Chart Mechanical Electrical
  • Headlamp switch
  • Central junction box (CJB) fuse(s).
    • 1 (15A)
    • 9 (20A)
    • 26 (10A)
    • 15 (7.5A)
    • 7 (10A)
  • Headlamp bulb
  • Circuitry
  • Headlamp switch
  • Lighting control module (LCM)
  • Underhood power distribution box (PDB)
    • F104 (40A)
    • F01 (20A)
    • F02 (25A)

Feb 12, 2017 | Cars & Trucks

1 Answer

Flasher relay in a 98 mercury grand marquis?

The fuse block the relay is located in is behind the knee bolster, the trim panel under the steering column, left of the steering column underneath the dash. Common source of problems if that does not fix it is the Light Control Module ( LCM), turn signal switch unit, headlight switch.

Mar 08, 2013 | Mercury Grand Marquis Cars & Trucks

1 Answer

Cant find headlight relay fuse

Your Mercury has a complex headlamp circuit but there is no headlight relay fuse. Instead, the central element is the lighting control module which receives power through numerous fuses. The battery junction box contains 40A fuse 104 and 50A fuse 103. The central junction box contains 10A fuses 26 and 8, 7.5A fuse 15, 15A fuses 23 and 1, 10A fuse 9, 15A fuse 7, and 10A fuses 21 and 19.

Dec 22, 2012 | 2006 Mercury Grand Marquis

1 Answer

The headlight fuse went out on my 2005 grand marquis, how do I find it?

no fuse for the headlamps on thiscar
Most likely a faulty headlamp switch

Aug 14, 2011 | 2005 Mercury Grand Marquis

1 Answer

I need instructions on how to change the headlamp bulbs on a 2005 grand marquis. Please help.

To remove first you want to remove the headlight door mounting screws and remove the headlight door. Then you want to remove the 4 retainer ring screws and remove the retainer ring from the headlight. Then you want to pull the headlight bulb forward and detach the wiring connector.

To install you first want to a
ttach the wiring connector to the headlight bulb and place the bulb in position, locating the bulb glass tabs in the positioning slots. Then you will attach the bulb retainer ring to the assembly with the retainer ring screws. Then you will install the headlight door and secure with the screws. Then you will check the headlight bulb aim and adjust as necessary

Let me know if this helps you.

Mar 07, 2011 | 2005 Mercury Grand Marquis

1 Answer

Head lights turn on and off while driving

Couple of things to check - check grounds around headlamps and in engine compartment. The other possibility is headlight switch is going bad. It used to be a common Ford problem - condensation and wear in headlight switch, making loose connection. Could also be faulty dimmer switch - lever used to flip hi/low beams

Feb 22, 2011 | 2003 Mercury Grand Marquis

1 Answer

What size fuse for the headlights? where is the fuse located on the fuse panel

headlamps fuse 40AMP MAXI-FUSE
location : engine compartment fuse panel (says LPS FUSE)

Feb 07, 2010 | 1993 Mercury Grand Marquis

1 Answer

Location of headlight relay on 1993 mercury grand marquis, head lamps flash off and on after 15 mins

that is caused by a "circuit breaker" not a relay. when it starts flashing, carefully go over the harness from the firewall to the rf headlamp, there is a short somewhere.

Oct 15, 2009 | 1993 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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