Raido Problems

Grey Front Right + Grey/Black -

White Front Left + White/Black -

Purple Right Rear + Purple/Black -

Green Left Rear + Green/Black -

Black Gnd

IIRC Blue was for the power aerial & Yellow & Red were power 1 permanent & 1 was Ignition powered.

If your still using the stock bose speakers they are only 2 Ohm and powered and you need something like a Peripheral VEN 4/4.5 adjustable line converter that came with my car. Failing that I think you'd be better off replacing the speakers with some decent units at the same time.

HTH