Once again the wireing gremlins have struck.Damn IT!!!!!. Ok Im ok but I have been out in the rain trying to figure out why my 1-My head units not working.(power but no sound?) and 2 why my cb radios not working. I was useing the cig lighter but that has now crapped out and for no good reason so I was gonna draw power from the fuse block with one of the add a circuit has anyone used them and are they worth it or is there an easyer way to hard wire to the fuse panel.