1 Topic by SolidRearAxle

  • SolidRearAxle
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  • Registered: 2021-01-25
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Topic: Power supply determining power and ground

So I’m new to wiring, and determined to figure this out on my own, it doesn’t look too difficult, but there is one part I can’t figure out and am worried about causing damage.

The wiring instructions say to take power from the female DC plug to switch 1, and ground to the PID. How do I tell which wire is positive and ground? I don’t see any colored sheathing, markings on the plug or anything else. Any help is appreciated.

http://soliforum.com/i/?exx3Coz.jpg

2 Reply by Kronikabuse

  • Kronikabuse
  • Kronikabuse
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Re: Power supply determining power and ground

Plug it in and use a voltmeter to determine polarity

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3 Reply by BFeely

  • BFeely
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  • Registered: 2020-12-23
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Re: Power supply determining power and ground

Does one wire have ribs on it?  If so I believe that is negative.  Of course do verify with a voltmeter.