ok, a few days ago i bought a radio to replace what i thought was a broken radio in my '95 nissan maxima, i got it all wired up(had the wiring harness set up by a friend of mine, he's knowledgable enough in wiring that i know he got this part right), but when we put the radio in, it still didn't work, now, i had assumed it was a fuse problem, so i checked the fuse box under the steering wheel, the fuses for the radio looked fine, so i ask, does anyone know what the problem could be, and if so, any solutions?