Anyone have a Radio (entertainment not communication) that stays programmed and doesnt have to be reprogrammed to stations when the battery cuttoff is used?
It's done by routing the radio power to a fuse that's on the other side of the battery cutoff. Make sure the fuse is the same one that's rated for the radio, which you can find in the owners manual. Let me know what vehicle (year, make, model) and I can tell you which wire to cut & use for the bypass.