What wire is the positive wire on the factory subwoofer Oct 04, 2018Do you have a multimeter that you can use? If yes, set the multimeter to measure DC voltage, and touch the speaker wires to the probes. If your probe is touching a wire with an opposite polarity, such as the positive probe to a negative wire, you will get a negative numerical reading, or a negative zero depending on your multimeter. 1997 Jeep Wrangler Car Stereo Wire Colors and Locations Disclaimer: * All information on this site ( the12volt ) is provided "as is" without any warranty of any kind, either expressed or implied, including but not limited to fitness for a particular use. Any user assumes the entire risk as to the accuracy and use of this information. Please verify all wire colors and diagrams before applying any information.