No gauges work, no fan LED, nothing, just a speedometer gauge works. I have a 93 seville sts and i tried to get a stereo installed and my friends cut my previous harness because none of the aftermarket ones fit. It worked for a little while then everything lost power in the dash. Only the speedometer works now. I got help splicing back the wires to the old head unit so that works again, but still no power. Any idea what I need to do? I have an aftermarket wire harness I can hook up, but I checked all the fuses and they are fine. What do i do?