I want to hook up this radio in my shed (XF2F-19B132-BC). There are 14 wires coming out the back and I don't know which one is 12+ volts. I have tried the Ford wiring diagram but that's no help in this case. There is another # under the bar code; CE297500. The radio is for a Ford truck or Van 1995 - 2000. If you could help identify the power wire it would help Cheers Terry