Where can you find a free wiring diagram for a Mazda millenia factory amp?
You can obtain a free wiring diagram from most Mazda dealerships. You can also obtain a free wiring diagram from most auto-parts stores.
No the factory head unit on a 2001 Mazda Millenia does not have pre outs. You can easily make your own pre outs if you want to keep your factory head unit with a line output converter (LOC). The converter takes the wires from the back of the radio to the rear speakers and converts them into 2 RCA pre outs. Hope this helped.