ok, ive installed my new rockford/head unit in my 1990 thunderbird. It works just fine but i had to run an extra cable from the headunit to the battery. I did this because without it the cd player wouldnt play long without the direct hook up. My question is, do i have any other options to power my headunit without runnin' it directly to the battery? Also, when i hook my amp up and run the wires to the headunit will that give it enough juice instead of the extra wire?
Quote "My question is, do i have any other options to power my headunit without runnin' it directly to the battery?"
I'm not sure, but make sure you've got a fuse on that cable you've run from the battery less than 18" from the battery. You can buy a small in-line fuse holder that would work at radioshack. See here: https://www.bcae1.com/ for why a fuse is a good idea and what size to get.
Quote "Also, when i hook my amp up and run the wires to the headunit will that give it enough juice instead of the extra wire?" Huh? The headunit will not be getting any power from the amplifier. They should be on separate power runs.
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New Project: 2003 Pathfinder
Did you use a wiring harness for that car? You shouldn't have to have a cable run to the battery for power.
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Build the box so that it performs well in the worst case scenario and, in return, it will reward you at all times.