I have a 97 ford ranger and Im trying to put a 636ca boss cd player in. my truck already had an aftermarket harness in it so I was trying to connect it to that. All of the colors match up except for a navy blue and magenta colored wire on the cd plug in wires. And on the wiring harness there is a red one and 2 blue ones that don't match up to the cd player. What do I do with the ones that don't match up? Am I going to have to buy a new harness? Can someone help me out? Please and thanks