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Old 05-22-2011, 12:11 PM   #29
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Very sorry to hear of all your problems with the genset
I too have had my share of issues with that 4Kw KY series POC
I hope you do not have a failed fuel pump on it as I did after only 25 hours of use
My dealings with Cummings / Onan were about a fruitful as yours
Their stock answer take it to the dealer - no exceptions
I had to answer - No way not driving 240 miles round trip to the nearest dealer
Send me the part I will install it myself and be out the $80.00 rather than the several hundred in gasoline and days on the road for "Warranty" service
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Old 05-22-2011, 02:07 PM   #30
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Quote:
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Actually rethinking my statement, you wouldn't have press the AUX switch, the alternator should charge the house batteries anyway.
Funny you should mention that. I bought the rig a year ago and could have sworn the engine charged the coach batteries. I noticed last month that the engine was not charging them. I told the dealer and they said only the genset will charge the coach batteries. That only on high end rigs does the engine charge the coach batteries.

How can i find out for sure?
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Old 05-22-2011, 02:59 PM   #31
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"I told the dealer and they said only the genset will charge the coach batteries. That only on high end rigs does the engine charge the coach batteries."
This is strange, I have owned 3 motorhomes since 1976 and all of them charged the coach and chassis batteries with the engine alternator. Rest assured that our 1976 Champion was not a "High End" coach! I believe that your dealer is BS'ing you on this one.
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Old 05-22-2011, 03:06 PM   #32
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Funny you should mention that. I bought the rig a year ago and could have sworn the engine charged the coach batteries. I noticed last month that the engine was not charging them. I told the dealer and they said only the genset will charge the coach batteries. That only on high end rigs does the engine charge the coach batteries.

How can i find out for sure?
I have a power panel on mine and the one time I left the house batteries go low enough not to start the gen I could see the low volt reading on the meter within a few minutes or less after I started the chassis engine the voltage came back up on the house batteries, I'm sure you could check yours the same way which would answer your question for sure.
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Old 05-22-2011, 05:03 PM   #33
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Yes the engine alternator should be charging the house batteries
The Boost switch relay does double duty - "on th elower end units" when the engine is running the ignition switch powers the relay that connects the Engine batterty to the house batteries. Both get charged by the engine alternator when driving, when stopped the iginition swith opens th relay and there are two separate circuits. Yes even my 1986 Class C rig was hooked up that way.
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Old 05-22-2011, 07:31 PM   #34
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Yes the engine alternator should be charging the house batteries
The Boost switch relay does double duty - "on th elower end units" when the engine is running the ignition switch powers the relay that connects the Engine batterty to the house batteries. Both get charged by the engine alternator when driving, when stopped the iginition swith opens th relay and there are two separate circuits. Yes even my 1986 Class C rig was hooked up that way.
How can I fix this? The engine aternator used to charge the coach batteries and now it doesn't. What and where do I need to check? If it is the relay, where is it and what does it look like? I doubt the relay broke, maybe a wore came off or something.
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Old 05-23-2011, 06:52 AM   #35
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You may just have a battery isolator someplace in the circuit. This should have three posts on it. Usually the center one is from the alternator and one goes to the chassis battery circuit and the other to the house battery circuit. My Champion and my Holiday Rambler. A defective isolator could be your problem.
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Old 05-23-2011, 09:00 AM   #36
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Check with your coach manufacturer since each of them implement their designs a bit differently. Winne has all the drawings available on their web site, not sure about Fleetwood. Do you have a "Boost Switch" if so when pressed do you hear the click of the relay? Could all be related
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Old 05-23-2011, 09:42 AM   #37
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That doesn't surprise me a bit...I recently had my coach into Cummins for some work and I had to tell them again and again what problems I was having and describe what they needed to look for. I would tell them everything and the next day, it was like I had never talked to them. I am very disappointed in Cummins and their personnel.
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