How JustAnswer Works:
  • Ask an Expert
    Experts are full of valuable knowledge and are ready to help with any question. Credentials confirmed by a Fortune 500 verification firm.
  • Get a Professional Answer
    Via email, text message, or notification as you wait on our site.
    Ask follow up questions if you need to.
  • 100% Satisfaction Guarantee
    Rate the answer you receive.
Ask Chris (aka- Moose) Your Own Question
Chris (aka- Moose)
Chris (aka- Moose), Technician
Category: Ford
Satisfied Customers: 48329
Experience:  16 years experience
Type Your Ford Question Here...
Chris (aka- Moose) is online now
A new question is answered every 9 seconds

My headlights wont turn off unless I pull the low beam

Customer Question

My headlights wont turn off unless I pull the low beam fuses. Then the alarm dings until I pull the switch fuse
JA: Have you checked the fuses? Have you checked the bulbs?
Customer: Yes fuses are good and lights are good
JA: What is the model/year of your Ford?
Customer: 2002 F250 Super Duty 7.3 diesel
JA: Are you hoping to fix this yourself? What have you tried so far?
Customer: This has been going on for awhile and only created a problem when I had the light switch to auto. If I turned the switch off the alarm would keep beeping until I took the fuse out. Once I took it out and replaced it the lights would go off and no beeping. As long as I turned the switch to the right it would work fine. I loaned my truck to my daughter and they removed the fuses but now unless I remove all 3 fuses lights stay on and alarm beeps
JA: Anything else you think the mechanic should know?
Customer: Thought it might be the auto light sensor so I disconnected it and still same problem.
Submitted: 1 year ago.
Category: Ford
Expert:  Chris (aka- Moose) replied 1 year ago.

Welcome, I'm Chris (aka Moose) I prefer to work when others don't, I am here around lunch and after dinner till after midnight.

If you remove and unplug the headlights switch, do the headlights go out and the warning chime does not sound?

Customer: replied 1 year ago.
Sorry had to step out and just got back so will try that tomorrow. If it works any suggestions?
Expert:  Chris (aka- Moose) replied 1 year ago.

I can not make a suggestion yet till I know those results. Responding tomorrow will be fine.

Customer: replied 1 year ago.
I removed and unplugged headlight switch, chime stopped but headlights and running lights stayed on.
Expert:  Chris (aka- Moose) replied 1 year ago.

Thanks, ***** ***** unplugged, head and parking lights remaining on. Does removing fuse 7 kill the headlights and does fuse 17 kill the parking lights?

At the unplugged headlight switch connector, there should be no power on the dark blue/white wire. If the answer to all 3 questions is correct then its a bad vehicle security module.

This is my 1st answer, but does not have to be my only answer. You the website and myself expect you to have a great experience with my help. Please let me know if you are pleased by selecting a star rating above or by replying and saying your pleased. Not rating or rating 1-2 stars does not benefit you nor me in any way. Follow up and reply as often and when needed, there is no extra charge to do so.

Thanks Moose.

Customer: replied 1 year ago.
Ok I checked fuse s and pulling 7 does cut power to headlights and 17 cuts power to parking lights. When I checked the blue/white wire it did not have power with fuses installed so as stated you believe the security module needs to be replaced?
Expert:  Chris (aka- Moose) replied 1 year ago.

Thats correct, time for a new VSM

Customer: replied 1 year ago.
Ok now that you have determined the problem where is it located and any recommendation on where to purchase? Also I am not a mechanic but have worked on my own cars for years and have construction equipment mechanics I work with. Safe to say either myself or construction equipment mechanic can replace this?
Expert:  Chris (aka- Moose) replied 1 year ago.

The VSM is behind and below the dash HVAC control.

Its best to purchase the module from a dealer.

If you have a Ford IDS tool to program the replacement VSM you can replace this yourself.

Expert:  Chris (aka- Moose) replied 1 year ago.

Hello again Chris here,

  • I am following up with you to see if you got everything you needed from my answer. We're you pleased with my help?
  • If you were not pleased with my help, please let me know by replying so I can help more.
  • This post is coming up on the 7 day mark where it times out. When a post times out, that means it's no longer on my active list (you reply and I may never know it.)

Thanks Chris

Customer: replied 1 year ago.
Hello wanted to let you know your diagnoses was incorrect it was not the VSM it was a bad connection on the auto light sensor. So before I leave feedback wanted to give you opportunity to refund my money if not I will leave feedback accordingly, please let me know.
Expert:  Chris (aka- Moose) replied 1 year ago.

Sorry the Ford diag steps I responded from using your test results put you down the wrong path. Not rating or rating bad will not result in a refund. You can use the contact us link at the bottom of your screen to do that.