Quote:
Originally Posted by r3lapse
I bought a multimeter a long time ago, but I have no idea how to use it. I did some google searches and measuring the +12V wire seems easy enough. How would I measure the REM and ground, though? Also, why are there four wires when there are only 3 remaining inputs on both AMPS (12V, REM, and GND).
Thanks a lot for your help Dave.
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The meter will read negatively if the connections are reversed. The turn on wire would show a positive value when the radio is turned on or car is turned on. As for the other wire I wouldn't worry about something that's not needed.