OK so I have attempted installing an aftermarket amp and sub to my 2011 f250 w sync and I accidentally touched my factory speaker wires to the amps output and now I have no sound. At first only the right side had sound then managed to lose it also so now I have no sound whatsoever. Please help

 

Did you check the fuses in the cab? Check fuse 19 (20amp amp and subwoofer), fuse 29 (20amp this is the sync gps fuse) fuse 38 (10amp radio). If no fuses are blown....take ohm meter and check for shorts to ground.

 

Those three are good

 

Which ground? Was thinking maybe a problem with the factory amp or something?