Hey guys, the auto window in my 99 F250 hasn't worked since I got it. However today, for the first time, when i had the door open, I pressed the down button, and it went all the way down like its supposed to. However, it didn't work again, whats going on? Is there a fuse or relay for the auto window? Thanks

 

Like everything else on the new trucks, it's complicated. There are relays and modules that are involved. But, in the end, you should have voltage on the lightblue/black wire at the door switch. If you don't, we can work backwards from there.

If you do have voltage, then check to see if you have voltage on the white/black if you move the switch to down, and voltage on the tan/lightblue if you move the switch to up.

Hopefully you will find the switch is bad.