Might be easier to locate the block heater......follow the power cord from it to see where it goes, if different, then finish following the plug wire you posted to determine what it is.......I take it you never used your block heater?
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2012 Essex 4544 2011 Jeep JK, M&G Braking, 2014 MTI 27' Hog Hauler, Wireless brake control, 2006 Ultra & 1989 Springer, 2003 Harley-Davidson
FLHR Road King Anniversary
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