Post by
lofapoo »
https://forums.nicoclub.com/lofapoo-u12390.html
Wed Sep 12, 2007 11:49 am
To find out the speaker wires, locate the speakers and check the wiring on the back. Usually the bigger plus is pos while the smaller is neg, just write down the colors for each speaker.
After you've eliminated the speaker wires, all you really need to do is find the 12v+ wire because you can find your own grounding point. If you have a voltmeter handy ground one prong of the meter while rubbing wires against the other prong. When you have a 12v+ reading, you've found your power source wire, which you can tap the red and yellow wires from the head unit harness to. If that doesn't work just grab some old speaker wire and run it straight to the battery from the deck, just make sure you have a fuse somewhere in there.