Thread: Running lights
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Old 10-06-2019, 12:06 PM   #4
sourdough
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Join Date: Feb 2014
Location: W. Texas
Posts: 17,702
I'm a believer in a VOM. The lights work on battery and ground with the filament of the lamp in between. I would break out the meter and see if you lost the power from the connector or the ground at the trailer.
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