Most of the time when you have the everything hooked up right and it wont cut on do this: Disconnect the ground wire, find a good grounding position (one of the shifter bolts) and run a direct ground to the cd player. If that does not work try and hook the 12v constant from the car to the 12v constant and the ignition/acc and see if that works if it does you have a problem with the acc wire. Most of the time its a bad ground though.