I have a 2008 expedition EB with oem radio/ nav. There is no power to the 5amp fuse #28 for the radio on either side of the fuse (with key on.) The radio stopped after I had to charge the battery from a parasitic draw. I finally stopped the draw after disconnecting all the wires from the back of the radio. After a week of sitting it started right up. I’m not sure if the radio is no good or the amplifier without having power to #28. I do have power to #1 pin. I don’t know why the wire has no power before and after fuse. I did all testing with an electrical meter. I’ve seen that other people have had the same problem with no power to #28 but I could not find anyone had a solution. Please if you could help I would appreciate it.