Horn - wiring issue on 2007 F150
 

When I try to turn on my brights in my 2007 my horn goes on as well. Conversely when I honk the horn the brights go on. Anyone have any idea why this happening and how I can fix it?

Sounds like a security function is operating. If you have keyless entry, lock the truck with it and then unlock it and see if the problem is still there. If yes, then disconnect your trucks battery for 15 to 30 minutes, reconnect and see if the problem is still there. If its still there, then you have an electrical/data issue that a tech scanner will need to hunt down.

I do not have keyless entry, it is a stripped down work truck. I will try and disconnect the battery and see if that works. Thanks for the advice.

Lights and Horn
 

I posted about a month ago about a problem I was having with 2007 XL and when I turned the brights on the horn sounded. The problem comes and goes. Well tonight I turned my lights on and the horn came on and did not stop until I turned my lights off/ Does anyone have any idea why this is happening and how I may be able to fix it? Any and all help is appreciated.
Matt

I moved your post into the original thread you started.

If the problem still comes and goes, then I think you've got a short or a pinched wire in a harness somewhere. Electrical problems that are inconsistent are really hard to work out on-line. There are body control modules, low voltage sensing loops, data communications lines, etc. You might find it more worth your time to take it to a Ford dealer that can put it on a tech tool and have it run commands to find where the problem area is.

I agree, sounds like an electrical gremlin. We could offer ideas, but the possibilities are numerous. It would be best to take it to your local Ford dealership.