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. Thanks.

 

David. I did same thing. did you find the issue?

 

I know faulty DRL module will cause similar issues. Maybe you damaged the DRL Module.