I was installing an aftermarket unit in my 07 F-150 and everything was going fine until I tried to wire the reverse camera, then suddenly nothing No power to the new head unit nothing. so I re-installed the OEM MP3 -6cd changer unit and it only powers up and cycles throught the CD's but the radio doesn't work. I need help because I don't know what I did wrong, but I'm in panic mode right now. I need some serious help.

 

First thing i would double check is to make sure your wires all hooked up correctly, and there arent any shorts in them.

 

check your fuses... If you didnt unplug the battery when you were wiring it up you could have easily shorted out something through a ground and poped a fuse... like accidently touched a + wire onto a ground in the dash.
-Patrick

 

I've checked the wiring and I couldn't find a short, Do I just focus on the fuses that deal with the radio since it seems the radio was the only one affected or can it be someother fuse. Thanks guys.

 

Found it! I burned out fuse #22 and replaced it with a new one and the radio works fine. I finally finished wiring my Valor DTS-660WT multimedia Head Unit with two Valor VH-700WR headrest monitors, PAC SWI-X Steering Wheel Radio Control Interface and an EDGE A2 backup camera. Everything is working fine except for the darn subwoofer, I've yet to figure out that mystery.