i replaced the battery in a ford f-350 superduty and now the radio will not work.can anybody save me a costly trip to the dealership?????

 

Change of battery should not harm your radio.
Sounds like a fuse problem. check fuse box, If you have an aftermarket radio then also check the fuse on radio line since they have that a safety in case of a short.
Also be sure that old battery did not have a separate connection direct to radio (normaly for high power amps) that you might have missed when instaling new battery. Hope this works if you have not found problem yet.