Question about 2004 Mercury Grand Marquis

1 Answer

Headlights come off an on

They come on and off. You can hear a click when they come on an off, but all the other lights are not affected. Sometimes the the headlights will not go out.

Posted by on


1 Answer

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points


    An expert that got 10 achievements.


    An expert that got 5 achievements.

    Vice President:

    An expert whose answer got voted for 100 times.

  • Master
  • 534 Answers

Check operation of the headlight contol switch is ok.
If above ok check Headlight relay operation.

Posted on Jun 21, 2009


1 Suggested Answer

  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi there,
Save hours of searching online or wasting money on unnecessary repairs by talking to a 6YA Expert who can help you resolve this issue over the phone in a minute or two.

Best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.

Here's a link to this great service

Good luck!

Posted on Jan 02, 2017


Add Your Answer

Uploading: 0%


Complete. Click "Add" to insert your video. Add



Related Questions:

1 Answer

I have a 1996 gmc Sonoma. Headlights will work sometimes.

Consider the dimmer switch on the steering wheel; the wires from it wouldn't affect the tail lights, but could possibly affect the headlights. Hopefully loose wires from the assy is the problem.. replacing the unit might be difficult. or expensive.

Jun 01, 2015 | 1996 GMC Sonoma

1 Answer

I have a 92 s-10 pickup that when I turn key over my truck does nothing but I can still push start it and still have power throughout the whole truck

Are you hearing a clicking sound while trying to crank your engine? If so, check your battery by turning on the headlights. If you have lights, leave them on & have someone try to start it while you watch your headlights. If they dim and/or go off while trying to start it, your problem is your battery.
If they're not affected, your problem is most likely a starter solenoid. Im not familliar with that model, but this test stands true on most any vehicle. Of course, that's not the only two things it could be, but it's a starting point. Hope this helps.

Oct 24, 2014 | Cars & Trucks

1 Answer


Not sure about your question. It could be read two ways.
Way #1: (When I put my emergency lights on it effects my headlights.)
If there is an effect, you could have a shorted ground wire, allowing current to find another way into the circuit. Visual inspection might uncover the problem.
Way #2: (When I put my emergency lights on, should it affect my headlights.)
No, If you turn on your emergency flashers, there should be no effect on your headlights.
Electrical problems can be very difficult and costly to diagnose.
Try googling your exact problem and maybe others have had the same problem.
Good Luck

Apr 17, 2014 | 1995 Toyota Corolla

1 Answer

Instrument panel on 2003 Honda CRV starts flashing when headlights are on

Have had a similar experience with my 2000 Ford Windstar. The extra load added by turning on the headlights affects the instrumentation power feed. The illumination flickers and the gages go crazy. Your 2003 CRV may have its original battery which is near death. It took me four batteries to stabilize things and I still get the flickers at night sometimes

Apr 13, 2013 | 2003 Honda CR-V

1 Answer

2002 Jeep liberty headlights cut off and then back on at random times. weather makes no difference nor hot or cold. went a way for a few months and now it has started all over again. hear clicking sound...

the clicking your hearing is the relay trying to stay engaged, its heating up causing the relay to power down, which in turn you lose the lights, the heat is caused by the electrical current supplied to the replay, Not the outside temp , locate that relay and replace it, and your problem should be gone

Aug 10, 2011 | 2002 Jeep Liberty

1 Answer

Crazy clicking/flashing lights

There is a bubble shaped sensor on you center dash near the windshield. It may be dirty, blocked, or broken. If you hear a high speed click and the lights strobe pretty quickly, it may be a bad relay. Last, you may have a bad ground. But - I doubt it since the lights work fine when not in Auto mode. I would start with the sensor then relay.

Apr 24, 2009 | 1998 Jeep Grand Cherokee

1 Answer

The dome lights and headlights blink off and on. I can't drive car at night because of this. There seems to be a buzzing noise coming from the headlight area.

If both the headlights and dome light are affected i would suspect the haedlight switch. That is the part that would be linked to both issue. Door jam switchs would affect the dome light but not the headlights.

Mar 22, 2009 | 2000 Dodge Durango

1 Answer

Headlights will not go on in on position.

that click tends to tell me it's a relay... if you can hear it... it's probably located on the fuse panel.... locate the one for the lights affected and replace it.


Dec 16, 2008 | 1998 Toyota Corolla

4 Answers

Rip 1992 chevy corsica

have you checked to see if it has any fuel pressure? If it has fuel check to see if you have a good strong spark

Jun 06, 2008 | 1994 Chevrolet Corsica

Not finding what you are looking for?
2004 Mercury Grand Marquis Logo

Related Topics:

258 people viewed this question

Ask a Question

Usually answered in minutes!

Top Mercury Experts

gerry bissi

Level 3 Expert

4382 Answers


Level 3 Expert

82322 Answers


Level 3 Expert

5690 Answers

Are you a Mercury Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides