How do I tell which wire is positive and which wire is negative on the door speakers and the rear speakers?
Unplug the wires and note which wire goes where. then apply a battery to the speaker terminals, 9volt will work fine. If the cone moves out you have it connected to the proper + and - if it moves in then its backwards. With that you should be able to figure out which wires are + and -. Or you can just buy a service manual.
The one with stripe is negative.
