Trying to wire an mp3 headunit into brothers car, its a uk vauxhall omega elite afaik a Chevrolet Omega / holden commodore.

It has a double din headunit with cd player, removed, bout an iso to flyleads converter, connected up new mp3 headunit. no sound....


Seems this car has a bose amp and sub, the sub is under the back window the amp is hidden and a mystery.

Anyhow, seems the front iso connector feeds audio to the amp which drives the speakers, but I cant find how to turn on the amp......

anyclues ?