Hello ramers My ram dies when i turn the stock radio on , the a/c light wont come on , Nore the air comes out cold I change the fuel pump thinking it was bad, I put the code reader but shows Everything Passes. When it dies it has a hard time starting until i take the battery post off and put it back on it start up again but it act as if it does not have any gas getting to the spark plugs . Can any one help?????

Thanks for ready

John

check the belt. bad belt/tensioning means no alternator rotation (turns off) and no ac compressor rotation (no cold air). squealing when turned on indicates bad belt/tensioning.

I don't know how to explain it turning on again after you pull the battery cable.

On newer vehicles the radio is tied into the BUS system. With this system a faulty component on the BUS line can pull the whole system down. Unplug the radio connectors and try it for a few days and see if this is your problem.