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markeb01 · 12-13-2011, 05:35 PM

Are you aware they work “backwards”? There should be 12v power all the time at the lamp. The ground side of the circuit is controlled through the rheostat on the light switch.

12-13-2011, 05:35 PM	#7
markeb01 Senior Enthusiast Join Date: Feb 2007 Location: Spokane Valley, WA Posts: 8,356	Re: In today's edition of 'old trucks are fun'... Are you aware they work “backwards”? There should be 12v power all the time at the lamp. The ground side of the circuit is controlled through the rheostat on the light switch.