Question about 2004 Mercury Grand Marquis

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Headlights go on and off while running - 2004 Mercury Grand Marquis

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Most likely cause is the stalk switch

Posted on Apr 25, 2010

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Posted on Jan 02, 2017

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2 Answers

How to find an electrical disturbance in 1998 ford expedition


Normally this condition is the result of a poor body ground connection. Testing for this can be deceiving. At the static(nothing on) condition, testing can show a good ground. However when a circuit is excited, it has a determined resistance and a set current flow. If the ground connection to this or a branch circuit is loose, corroded, or broken wire. This will allow just enough connection to show as being good, but not good enough to complete the circuit with the required amount of connection when energized.

Nov 30, 2014 | 1998 Ford Expedition

1 Answer

Are tailights supposed to be on when headlights


When/if you turn the headlights on with the switch the tail lites should be on but if you are asking about when you start and run the car without manually turning on the headlights then no, the headlights you are referring too are actually day time running lights (your headlights @ 1/2 the power) and are for safety. when those are on your tail lights will not be on.

Sep 16, 2014 | Honda Civic Cars & Trucks

1 Answer

Free ford troubleshooting


It sounds like the day running lights are coming on, not the headlights. If I'm right, the lights would come on when you put it in gear. Other models will come on at engine start. If it is the running lights, not the headlights, you can check by setting the parking brake. This turns off the running lights, but not the headlights. Verify this, and I think you will be happy to find there is nothing wrong. Good luck!

May 11, 2014 | 2006 Ford Taurus

1 Answer

1998 Lumina lights don't work at night!The lights work during the day but not at night. Does anyone know how to fix it?


Theres a sensor in the middle of the dash by the front windshield that detects sunlight and triggers the automatic headlights. The main headlights and daytime running lights might be on a different circuit, in which case they daytime running lamps would turn off at night and the main headlights would turn on, indicating the main headlights arent working and the daytime running lamps are working as intended.

I would check all the fuses related to headlights, check the bulbs and check the switch, then last the light sensor on the dash.

Jan 08, 2014 | 1998 Chevrolet Lumina

1 Answer

Headlights wont work properly


Sounds like you have a problem in your headlight switch. As far as them staying on sometimes when you shut the car off are you referring to daytime running lamps or the regular headlights? If it's daytime running lamps that like to stay on and your headlights do not like to turn on then there could be a combination of headlight switch and daytime running lamp relay.

It is possible the relay gets the signal from the headlight switch as well, since they generally turn off when you turn your headlights on.

Dec 19, 2009 | 2000 Pontiac Grand Am GT

2 Answers

'91 Subaru: dash & running lights won't turn on with headlights


This is a problewm I have been researching. On the 91 Loyale there are two headlight relays. The relay for the left headlight also controls the instrument lights and the running lights. If the right relay is working and the left is not, the left headlight will be dim because of a back electrical path through the high beam indicator light on the dash, but the instrument and running lights will be out. I have been trying to find out where Subaru put these relays, but three Subaru service departments have been no help. One dealer's service department told me to remove the large bezel around the instrument panel. I did and the relays weren't there. Lots of luck.
John

Feb 22, 2009 | 1991 Subaru Loyale

2 Answers

No dashlights and no running lights in the rear


The main switch is bad that turns on all of the lights. New a new switch.

Jan 31, 2009 | 1997 Dodge Dakota

1 Answer

98 ford taurus headlights will not go off


either the headlight relay is stuck on. or the daytime running light module or relay is bad. to confirm find the relay center and switch the headlight relay out with another relay with the same part# on it. there should several in the relay center with the same part #. If this fixes the problem get a replacement relay. if not try switching out the relay for the daytime running lights. if no dice then unplug the daytime running light module.

mike

Jan 06, 2009 | 1998 Ford Taurus

2 Answers

!997 Chevrolet S10 headlight problem


ya know it kinda sounds like the headlight switch that switches from high beam to low beam has a bad contact. You don't have one of those 4-beam modules that turn on all 4 lights on high beam do you? that thing screwed my whole headlight system up, I ended up throwing it in the trash.

I have the chiltons and haynes manual, I'm sure between the two we'll find a good diagram. I gotta get my youngin to open house at school, but I'll pull the books out and send you the wiring diagram.

Aug 07, 2008 | 1997 Chevrolet S-10 Pickup

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