I have a 2003 Mustang with a V-6 3.8L. I purchased a SCYTEK Astra 1000RS on the web and need help installing it. It tells me to connect three of the wires from a 5-pin harness to the Ignition 1 output (negitive), Ignition 2 output (negitive), and Starter output (negitive). I do not know where to locate these wires or what color they are. Any help????

Thanks,

Mark