what do u mean u cut it and color matched the wires. the harness that is on the back of your new radio does NOT match the wires to your car. there is a wire harness u buy at any car place so that u attach it to the cars harness and then the wires match up with the am hu. if im reading this wrong and thats what u did, the hu probably has its own fuse, check that, as well the power wire for the hu has an inline fuse, check that. also make sure the ground wire is hooked up with a good conection