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Old 02-06-2010
guyfromiowa guyfromiowa is offline
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You must use a polarity-reversing switch. It works the same as the power windows in your car. Put the switch in one position and one of the wires is positive polarity and the other is negative. Put the switch in the other position and the two wires change polarities. I'll go see if I can find a diagram.

Guy
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