Red white wire 1992 Nissan Sentra

I have a 1992 NissanSentra radio which I want to install into my 1989 Mazda B2200.  I can account for all wires except the red white wire on the radio. I have the 1991-93 Sentra Sterio Information sheet, but it does not mention the RED / white wire. I would a[[reciate some help. Thanks,George

From what I recall i think it's the positive speaker wire for the left rear speaker output. It would be easier to put in an aftermarket radio to your truck. But, if your truck still has the factory wire harness you can get and the aftermarket wire harness adapter for it. And then get an into OEM radio harness plug for the sentra radio and simply match the colors. Then you just plug the aftermarket plug into you factory plug and plug the other side into the nissan radio. But in my opinion it would be easier to go with an aftermarket radio.Duane...

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