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GregOConnor · 08-19-2014, 13:36

test the switch legs for continuity to ground. if not continuous (no beep from your meter) assume it is a 12 volt + source. then add 12 volt to the center of your'in/out switch' , then move the switch, or add 12v+ to either side to see if it signals the relay. If it opens you have isolated the problem to the signal side of the relay. if it is a loss of power to the signal side of the relay, it is probably a broken wire or bad connection some place. there may be other source of 12 volt that is live when the genset is on or off that could work until you find the issue?? "a blown fuse is never the problem, it is one of the results"