I am installing an aftermarket stereo in my 70 mach. It need an unswitched power supply for the presets and the clock (1 Amp). I thought that the cig lighter would be a good source...Not. every time I hook up the power it blows the interior lights fuse (14 Amp). Why would this be? it cannot draw more than the cig lighter itself can it? Where else would be a good place to hook up without hacking up my harness or running wire back to battery??