Valiant Radio Hook-up Melt Down

On early As (and maybe later as well there is a factory 2 red/orange wire mini-harness that the factory used when a radio was ordered since the radio wiring was not incorporated into the basic under dash harness. The red wire connects to the 3 amp fuse in the fuse box (which is only hot when the key is on) and orange wire that connects to the instrument lighting. As others mentioned, doing it your way will also work as well.