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What is PWM+/- on a OEM head unit?

VelvetThunder

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Not sure if right place. And sorry, but this is on a Barina not a commodore :(. But hopefully, someone can help!

I just bought an aftermarket head unit and went to wire it in a TK Barina. The harness I bought is missing some of the pins that the car has. One of those is PWM- . There is a pin for PWM+. The PWM+ is running into the illumination wire in the harness I bought.

What do I do with the PWM-? There is a wire for it on the car side, but not on the harness or the head unit.
 

Kitsune

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possibly for an amplifier of some sort, if your car doesn't have a factory amp then it's not needed, if it does then it's best replace it with a more modern one and have it powered on through the wire labelled "remote" and have the amp tuned by someone that's a pro
 
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