I know this is a car audio question but, since I respect many of you here on this forum, I was hoping someone could help me out.
Many years ago I had aftermarket speakers and receiver put in my vehicle. It had been stolen many years ago and I have just recently gotten around to replacing the speakers and head unit. My problem is they car audio shop did a horrible job wiring and I have no idea what they did. The speaker wire colors and stripes are now meaningless. My passenger side door, to even get the new speaker to work, I have to use the negative green and negative orange wires to get the speaker to work.
I know how to test the speaker itself.
I know what the color codes are supposed to be.
I would just like to know if there is a way to test the polarity of the wire current. I do have a multimeter but cannot get a reading on the wires for some reason.