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Old 12-07-2019, 06:56 PM   #1
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Generator will not turn off by inside switch

I own a 2006 Tropical LX T350 with a Onan Quiet Diesel 8000 generator. From inside the coach I can start the generator just fine. The internal switch will not work to shut it off. I need to go outside and use the generator mounted switch to turn it off. I have cleaned the wiring harness at the generator connection and it appears to look okay. I looked at the back of the switch and did not see any loose connections. Does anyone know how to check the connections with a volt meter or do you have a wiring diagram for this switch? I had no idea a single switch could have this many connections. I have attached an image of the back of my inside switch and the wiring harness connection at the generator.
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Old 12-07-2019, 07:04 PM   #2
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My guess is to replace the Rocker Switch !
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Old 12-07-2019, 07:05 PM   #3
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check continuity from switched to genny with a test light.

Mine would not start from inside but shut off fine, it was control board,,

I had bought a donor genny for 400 bucks.. well worth it for, starter, control board, carb I needed, mine is gas but wiring logic is similar..

Still got the rest of unit, it had bad magneto pick up.. Mine had low hours..
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Old 12-07-2019, 07:29 PM   #4
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The Onan logic uses a momentary connection between battery + and either the start connection wire or the stop connection wire, if there is a break or bad connection in the stop wire it would cause this behavior, the same if their is a fault in the switch.
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Old 12-07-2019, 08:03 PM   #5
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Does anyone know what terminal position on the back of the rocker switch is the stop connection and what color wire? This will allow me to perform a continuity check before I replace a switch that I doubt is the problem.
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Old 12-07-2019, 08:37 PM   #6
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If it's a Carling brand switch you can easily take it apart and clean the contacts. Had to do that with a few of the switches in our 04 HR. Don't loose the spring inside.
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