Doh! Yep, it looks like the stock radio fuse (#34) is only 7.5 amps. This is what the wires should look like...
Black/Green=Ground
Blue/Black= Switched power = Fuse #32 7.5A
Orange/Black=Constant (battery) Power = Fuse #34 7.5A
Blue/Red=Power Antenna
White/Green=Illumination
If you had the stock hi-power system, you will have a 30A fuse #25, if not... Do you use your cigarette lighter? If not, just splice into that line. It's a 15A fuse.
HTH,
BP