Nathandeal1
CALIFORNIA
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I have a 14 fleetwood tioga montera 25k. When I’m park the generator works great but when i drive it automatically trips the buss fuse by the battery and shuts the generator off. I have replaced the buss fuse several times. It will start without it, my question is, what can the issue be? Is there even supposed to be a buss fuse to begin with? Is it a fire hazard to remove it? It only trips when i start driving.
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enblethen
Moses Lake, WA
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Joined: 01/05/2005
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Have you had any battery work done? Sounds like the chassis and coach system have reversed polarity!
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Nathandeal1
CALIFORNIA
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I actually did when i bought it from the dealership as the previous batteries were no good. (Dealer replaced as part of the sale) is there a cable or a way to double check that?
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NamMedevac 70
Reno
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Joined: 11/09/2020
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As a guess only I say the motor RV generator is causing an overload charge to the battery and electrical system when driving causing the buss fuse or breaker to trip. When in park not as much voltage output from car/truck/RV generator to trip the buss.
Correct me if I am wrong.
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enblethen
Moses Lake, WA
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Go to the 12-volt coach power distribution panel and use a voltmeter to check polarity.
I am guessing your two different system batteries are located under the hood. Verify that negative is connected to ground and positive goes to the 12-volt coach power distribution panel.
Not sure what type of battery isolation system you have. It could be a diode based or a relay based.
Clarify what you mean about generator works but when I drive it trips the buss fuse?
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Nathandeal1
CALIFORNIA
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This is a class c motorhome. The batteries for the home part (rv portion) is under the step. Under the step there’s two wire that are for the generator. There’s a 100amp buss amg fuse. It’s totally fine when the engine is off and the generator is going. But when turned on, the fuse is tripped from anywhere from 10 minutes to three hours (three hours being the longest, usually it’s within 5-10 minutes)
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jimh406
Western MT
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I'd try unplugging the battery charger if there is a plug for it, or add a disconnect so that AC charger won't charge the battery.
If there are separate batteries for the house/vehicle, you should add a switch or switch it so that the house battery is independent/not charging the vehicle battery. The switch is what a lot of RVs have.
I believe what's happening is that both the car and generator are charging your batteries and you are getting feedback, but that's just a guess.
Fwiw, I blew out a circuit on a Onan generator by starting it while plugged into shore power. So, be careful with your trouble shooting.
'10 Ford F-450, 6.4, 4.30, 4x4, 14,500 GVWR, '06 Host Rainer 950 DS, Torklift Talon tiedowns, Glow Steps, and Fastguns. Bilstein 4600s, Firestone Bags, Toyo M655 Gs, Curt front hitch, Energy Suspension bump stops.
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enblethen
Moses Lake, WA
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Is the 100-amp fuse in the cable feeding the genset?
Is it connected to the positive post on the battery?
What do you mean by it is fine when genset is going, then blows when it is on?
If genset is running, there should very little 12-volts DC on this cable.
Only possibility is vibration from genset is causing cable to be grounded out.
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Nathandeal1
CALIFORNIA
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@ envlethen - It is fine when the truck isn’t running. But when the truck engine is on, that’s when it blows the fuse.
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Nathandeal1
CALIFORNIA
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@ Jim - That’s a good possibility. It does charge the batteries when driving. So it may be a back feed/over charging issue that is causing the fuse issue. I have no idea to confirm this. Where would a switch be?
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