okay so i pulled out my stock radio in my 2002 f250 superduty. and when i put it back in it wont turn on. i checked all the wires and plugs and they are fine any ideas?!

 

There are three wires that I start with. Constant power, Switched power and Ground.

Try these
RADIO 12V|lt. green/purple |+ |radio |
| RADIO GROUND|black/lt. green |- |radio |
| RADIO SWITCH|pink |+ |radio |
| RADIO ILLUMINATE|lt blue/red (dimmer)|+ |radio |
| LF SPEAKER|org/lt grn-lt blu/wh| |radio |
| RF SPEAKER|wht/lt grn - grn/org| |radio |
| LR SPEAKER|gry/lt blu - tan/yel| |radio |
| RR SPEAKER|org/red - brn/pnk | |radio |

If you have power and ground, then I would suspect the radio is bad.

 

If you aren't getting power then you'll need to start checking fuses. Start with the ones labelled for the radio in your owner's guide, but if none of them are bad you will have to start checking all of the fuses on the truck. Ford does a shoddy job of labelling the fuses for everything they supply power to so sometimes it is a fuse that is not labelled for the radio. I lost my radio once and it turned out to be a fuse marked for the instrument panel.