I have a 2018 Ram Big Horn the original radio touch screen started ghosting. I have replaced the radio twice once with Best buy and once myself neither radio will turn on. I have checked all the fuses including the one by the fire wall. Cannot figure out why i have no power to either radio setup.

 

Have you confirmed that it's actually not getting power, or you're just assuming that because it won't power on? Have you checked both to and through the fuses, as well as at the B+ and switched battery leads (with the key On) at the radio?

-Rod

 

You DID use the proper adapter harness didn't you? The old cut and splice was never a good system but it worked on older models if you were careful and knew what you were doing. Newer ones in the last 15-20 years go through the computer system or body control module.