I just rebuilt a 2003 F250 with a 6.0 diesel. The truck was hit down the left side. I took the box off and put a side on the box and new doors and fender down the left side. I did do some welding on the frame and the cab corner of the truck. I unhooked both battery terminals when I did my welding but did not put and isolator on it to protect from back feeding back through the system. I now don't have any power to my windows or my radio. Also no lights on half my instrument panel. I bought a new instrument cluster and plugged it in and it worked for a minute and then went out again. I am ready to set this thing on fire any help would be greatly appreciated, I know I have read that other people on the forum have had trouble with this before. Thanks!!!! I tried all the fuses!!!

 

Sounds like something shorted and is shorting out the system and possibly more. One way to isolate is unplug everything, then slowly start plugging in components. I would start with the ECU as that is the brain.

EDIT: I was thinking as well, look at the wiring to make sure none of the wire jacketing didn't melt and shorting against the chassis.

 

also unhook alternator and see if that helps any time u weld on vehicle unhook alternator

 

My problems didn't start until I started welding, I had all power to everything before I started welding, I made sure that everything work when I first bought the truck, could this be a ground issue and where should I start to check, I am a body guy not a mechanic so I am just pulling stuff out of the air to try. I don't have an owners manual for the truck and am trying to figure out what the relays are for on the fire wall by the drivers side wheel well. Dont really want to take it to a garage but may have to!

 

the relays should be marked inside of cover as to what they are for

 

it still could have blown something in alternator i've had alternator issues give me a fit

 

Thanks, will the alternator make the instrument cluster screw up? I will check into that. I am just at my wits end, and I can't get passed that it doesnt have something to do with the time delay relay, cause everything that is not working is what works when you shut the key off without opening the door. I will keep checking. Also I cant find on the back of the cover where it says anything about what relay runs what. Thanks for any help.

 

i really don't know i just know i've had some bad experiences with alternators there is a member on here that is a whiz on techinical stuff i will see if i can get his address and send u a link to his page

 

https://www.fordforum.com/showProfile.asp?memid=6756

clink on this link and it will show his emaill address i think he could help more than anypne also may be able to send u a diagram for relays

 

If you need an owners manual, you can go here and download it

https://www.fleet.ford.com/maintenance/owners_manuals/default.asp