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95’ Mazda MX3 Factory Stero removal

Printed From: the12volt.com
Forum Name: Car Audio
Forum Discription: Car Stereos, Amplifiers, Crossovers, Processors, Speakers, Subwoofers, etc.
URL: https://www.the12volt.com/installbay/forum_posts.asp?tid=18270
Printed Date: March 23, 2026 at 11:08 AM


Topic: 95’ Mazda MX3 Factory Stero removal

Posted By: pampanga
Subject: 95’ Mazda MX3 Factory Stero removal
Date Posted: August 30, 2003 at 2:06 PM

Upon removing the stero I was surprised to find a 3rd connector, a single black wire. There is no voltage present in any ign or headlight switch positions. I'm guessing its a ground but would like to confirm this. Tracing the wire looks like a big project. Anyone familiar w/ this application?
Thanks.



Replies:

Posted By: GavinJuice
Date Posted: August 30, 2003 at 7:56 PM
Single black wire could be for an upgraded stereo system where an amplifier was used. ive come across the same thing where it was sitting there for no reason. Manufacturers wire cars for everything that it could possibly come with, whether it is used or not depends on what  accessories the person decides to buy with the car. Hopefully that helped.

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ROCK AND ROLL!!



Posted By: IFlyGC
Date Posted: August 30, 2003 at 8:08 PM

If you want to check to see if it's a ground, using a test meter, connect one probe to the black wire and the other to vehicle chassis.  If the resistance is fairly low, or it shows continuity, it's a ground wire.  If it's not, it's not!


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