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Old 07-25-2016, 04:25 PM   #26
my67c20
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Join Date: Jun 2002
Location: Tucson AZ by way of WI & CA
Posts: 509
Re: What is happening in this picture?

I think the OC means open circuit. Did you have the trailer hooked up? Those things like to be connected and on level ground, then they do a bunch of calibration and diagnostics. If all else fails GTS.
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