Ok. It is hard to say what exactly the previous owner has done.
Did he do the speaker by-pass because it was not working? Chances are he re-wired the speakers because the after market head unit would be best served without the OEM amp.
At this point, if the wiring has been altered for the speakers, just buy an after market head unit and trace/test each speaker connection if they are not labelled, to connect the new aftermarket head unit.
If you really want to make an OEM radio work in there, it is going to be a lot of wiring restoration, by the sounds of it.
1997 Buick Pk Ave (Soft Ride) Suspension!
Last edited by Soft Ride; 04-08-2015 at 04:56 PM.