Grey Front Right +
White Front Left +
Purple Right Rear +
Green Left Rear +
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.
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