Best Answer

You are going to love this "better mousetrap!" The light switch doesn't actually control the lights. There are a series of computer modules involved. When you turn on the switch, a signal is sent to the instrument cluster(which is a computer called a "HEC" or Hybrid Electronic Cluster). The HEC sends out a signal over the data bus network called the "CAN"(Controller Area Network). When the FEM(Front End Module) receives the request from the HEC over the CAN, it decides to turn on the front lights and sends a request over the CAN for the REM(Rear End Module) to turn on the rear lights. So, you could have a problem anywhere from the main light switch, the HEC, the FEM, (probably not the REM-since it's headlights), or anywhere in the wiring! Oh and BTW, the headlight switch is not really a switch. It is more like a position sensor. It sends a varying resistance out to the HEC so the HEC sees what position the switch is in by what OHM resistance it is receiving from the headlight switch, so you could also have a slight problem with a connection somewhere that would raise the resistance of that circuit and make the HEC think that you have the switch in a different position than what it really is in. Don't you just love technology?

Here is a suggestion. You may also notice that the overdrive switch in the shifter handle does not work, nor the compass, rear mirror auto dimmer and the rear side door lock switch on the overhead panel. This is all powered by a fuse (#14 I think). It could simply be a blown fuse which is what I had, but that was just a symptom of a damaged wire from the O/D switch in the shifter handle running down the steering column. I could replace the fuse and it would work for a short while, then blow again. The dealer finally located the worn wire and repaired it.

User Avatar

Wiki User

โˆ™ 2011-09-13 17:19:41
This answer is:
User Avatar

Add your answer:

Earn +20 pts
Q: Why would headlights stay on on a 2003 windstar?
Write your answer...
Related questions

How do you put the third row seat up in a 2003 Windstar and make it stay?

How do I repair my third row seats in my 2000 windstar that will not stay up properly.

Why do the high beam headlights not stay on in 2003 Malibu?

The dimmer switch is defective.

Why do your headlights stay on after ignition is off 95-Ford Windstar?

Did they used to go off with the ignition? On most cars, the headlights will come on at any time by just turning them on. The car does not need to be running or the key turned on.

What would cause headlights on a Honda Odyssey to stay on even after the engine is turned off?

Headlights might stay on in a Honda Odyssey after the engine is turned off because of a courtesy timer. The headlights will stay on for a few seconds after exiting the vehicle so the driver can go into a building at night safely. If the headlights are staying on all the time, check the timer for this feature.

Why do the headlights on a 1983 Chevy truck stay on no matter what?

even if you disconnect the battery the headlights stay on????????????? check the headlight switch

Why do your 2003 Lexus ES300 headlights sometimes stay on when you lock with your remote key and the headlight setting is on AUTO?

hit the lock button twice

Are the headlights on a 1998 Chevy venture supposed to stay on at all times?

Headlights are not to stay on all the time,only front parking lights.

Why do the headlights stay on and kill battery on the Oldsmobile aurora?

i would have the light switch checked to see if it is faulty

What would cause the chime to stay on when the headlights are on on a 1993 Thunderbird LX?

the chime would stay on if the keys are in the ignition (but the car turned off) and if the door is ajar to warn that the lights are still on

My Car headlights stay on when car is switched off?

They stay on cause they runnin off the battery. there should be a car headlights switch somewhere by your spedometer stuff...

Why do the headlights stay on when you turn off the car?

do the headlights come on automatically or manually, if manually turn off

Why do the taillights stay on when the headlights go on for a 1986 Chevrolet celebrity?

The taillights are supposed to go on when the headlights are activated.

Why would a 2001 ford f150 cargo and interior light stay on when doors are closed and headlights are off?

why would a 1995 ford f150 interior and cargo lights stay on with the doors closed ?

Why does headlights stay on with Suzuki Samurai?

try a switch

Why do your 2001 suburban headlights stay on all the time?

Why do headlight stay on all the time on 2001 suburban

In The Terminator for either 1997 or 2003 tech would the machines stay as advanced as they are or would they continue 2 get smarter more dangerous etc?

they would stay advanced

What would cause headlights on an 88 Honda Accord to stay on even after they have been turned off?

Bad relay? (points burned and not releasing)

How do you get the Headlights to stay off a 04 envoy while I'm at the drive in?

Set your parking brake before you turn on your ignition. This cancels out your headlights.

What would cause the headlights on a 1998 Mercury Mountaineer to stay on for 10 minutes after the vehicle is shut off?

It has a built in timer. You can adjust how long they stay on with the sliding lever located on the rear view mirror.

Why do headlights stay on 1998 Mercury Sable?

Replace auto lamp module.

Why do your 2003 Marquis headlights shut off after four minutes?

Your auto headlight switch only controls the delay after you turn off the ignition, if it's dark enough. The closer the pointer is to the 12 o'clock position the less time they will stay on, turn the switch more to the left and the headlights will stay on longer, up to 4 minutes. That switch has nothing to do with the sensitivity of the auto lamps, only the delay.

Why do the headlights stay on after the engine is off and the keys removed on a 1997 Mercury Sable wagon?

Hey Fred==Your car probably has auto headlights and has a module under the dash to control them. The module is bad. goodluckJoe How long do they stay on? They're supposed to stay on for about 3 to 5 minutes.

Why would the brake lights on a 1998 318ti work normally without the headlights but stay on constantly with the headlights?

if you recenly replaced bulbs u may have installed them backwards they should be running lights and brake lights if this is the case they maybe installed incorrectly

What would cause the driver side headlight on a 2003 Chevy Blazer to stay dim and the passenger side headlight work fine?

a possible solution would be to check ground wires. The driver and passenger side front lights have separate ground wires in wiring harness. The result of having ground wire disconnected is dimming headlights.

What would cause the odometer light to stay on after you shut off the car on a 97 dodge stratus?

The odometer light will stay on if the headlights are on a 1997 Dodge Status. Be sure to click the lights off even after shutting the vehicle off.