Hello, I'm looking at putting an adapter on my factory stereo so I can wire up my amp up, however, I don't just want to go in there blind cutting up wires. Is there a diagram I could follow to properly wire up my 2000 S80?

 

They are pretty hard to come across as of yet.

Does your car already have an amp?

If so it is under the passenger seat.

You might also be able to purchase an adapter from this company and just plug it into the radio.Follow link.
http://www.metraonline.com/product.aspx?sku=71-9221

Call them and see if it plugs inline to allow you run wires off of it for an amp.

 

It doesn't have an amplifier. I have the adapter already, so I'll give it a shot. Thanks

 

Let me know how it goes.