Not tryin' to be a dick, but you are testing by turning the key correct?Originally Posted by 91chevZ71
Pull your radio, and find the wire which has your acc power, and splice onto it. Run a wire from either your fuse panel (new circuit) or battery (fuse it) and a ground wire from a decent ground. Then run a wire from your aftermarket accessory to the same location, and tie them all together in a relay. (uses small amount of power from the acc power to switch on the fused power)
You do not want everything ran off of the truck's acc power.