Forum Discussion
happycamper002
Jun 01, 2017Explorer
Since you said that both input leads are black a foolproof in determining the polarity is by checking the input wires.
Usually, the neg lead has a ribbed finish on the surface of the insulation. Look closely and feel the wire and you will see the "line" or rib that runs in its entire length.
Please let us know how you make out.
Just a follow up:
If still in doubt. . .connect a diode with the positive lead hooked up to the neg ribbed lead before testing with battery power. It will let a pass thru current--meaning the polarity is correct. If wrong no current will pass through.
Having said this I assume that you know what you are doing and not hold me responsible for any consequences.
Good luck
Usually, the neg lead has a ribbed finish on the surface of the insulation. Look closely and feel the wire and you will see the "line" or rib that runs in its entire length.
Please let us know how you make out.
Just a follow up:
If still in doubt. . .connect a diode with the positive lead hooked up to the neg ribbed lead before testing with battery power. It will let a pass thru current--meaning the polarity is correct. If wrong no current will pass through.
Having said this I assume that you know what you are doing and not hold me responsible for any consequences.
Good luck
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