Have a 2003 F-150 that began experiencing issues. Alarm goes off for no reason, windows and sunroof won't work, engine starts intermittently, battery drains intermittently. Yesterday it ran fine, today it won't start (will turn over but won't fire) and when I remove the key all the accessories remain on (dash lights, ac fan etc). Any ideas????

 

check all your fuses i know a blowed fuse can cause these trucks to go insane lol or either your battery could have a dead cell in it i know mine had one and my windows wouldnt work

 

but i also had a blowed fuse and all of the lights stayed on

 

start simple--- clean and tighten your battery terminals, if thats not the cause maybe check the windshield for leaks around the bottom.