Post by
nate154 »
https://forums.nicoclub.com/nate154-u282913.html
Fri Apr 27, 2018 6:51 pm
On both my front doors the wires are red and green. I haven't found any wiring info out there that match my car. I did a multimeter test on them and found on the driver door the red is negative and green positive, and on the passenger, the red is positive and green negative. I don't know if this is right. It sounds good, though, with my new speakers hooked up. I don't know if it would sound bad if I had them wired wrong.
With the multimeter, I set it to DC Millivolts and touched the leads to the speaker wires until the negative symbol went away.