I have a 2011 E250. I attempted to install a Ford alarm system and clearly messed something up. The headlights will not turn off, no matter what. I had to pull the headlight fuses, the parking light fuse and the instrument cluster fuse to shut all the lights. Is there a relay or some sore of power module that I've damaged? I can't find anything like that in the fuse box diagrams. And can anyone tell me where to find a wiring diagram (besides Ford)? Thanks.

 

You can post this in the Van's forum: 1968 - Present Full Size Vans - Ford Truck Enthusiasts Forums if someone here doesn't have a schematic to share.

I would suggest getting yourself an EVTM which contains most of the electical/vacuum schematics you'd need for anything DIY. FTE also has a sweet deal with AllData for unlimited access to their data base of massive information--links for the special offer can be found at the top of most forum boards. Here's a link otherwise: Ford Truck Enthusiasts Forums - Announcements in Forum : 1968 - Present Full Size Vans

Hope this helps!

 

I ended up using AllData. It was the headlight switch, which I dropped. Thanks.