I'm replacing the door speakers in a 2001 Coupe Camaro with the factory sound system. I needed to know which wire was positive and which was negative so I bought a circuit tester. However, I keep getting the reading that both wires are positive. What could be causing this? I know the circuit tester works because I tested it on the battery terminals and it worked fine.
1 end goes on the negative post of the battery and the other end goes on any ground. some are grounded on the alternator bracket.
If you power it up, and go from one wire to ground at a time it will work, if you use the tester between the two speakers wires it will be positive both ways you hook it.
You cannot use a circuit tester on speaker wires. It is not the correct tester. All you have to do is look at factory speaker it's marked positive and negative.
Speaker wire carries AC current. A circuit tester designed for DC voltage won't work, at least for telling you which is positive or negative. (It doesn't matter whether you use chassis ground, or the other speaker wire, as a reference). In the driver's door, the positive wire should be tan and the negative wire gray. In the passenger door, the positive wire is light green and the negative wire is dark green.
