Help Dead Battery!

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Joined
Nov 17, 2019
Messages
897
Location
Prince William, VA
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Newmar
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2020 Ford F-150
Not sure what happened. We stepped out for the day and came back to dead chassis batteries. We’ve been connected the 30amp service for a week and a half and haven’t had any problems. Honestly I haven’t looked to see if it was charging because everything was running fine.

Anyway, everything is off, I’ve got the generator running but it seems nothing is being powered by the generator.

I’m not sure where the problem is coming from. PowerWatchdog doesn’t throw any errors but makes an audible click 2 seconds after being plugged in and disconnects power. A minute later, it tried to connect again and immediately disconnects.

I think the batteries have to have a certain amount of charge before the coach will take power?

Checked all the breakers, none are tripped.
 

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Joined
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@MapNerd ... not sure about the batteries but as to generator, there is a circuit breaker on the generator itself. Make sure that is still "ON".

FLStevre
 
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After the generator breaker, I’d check the 300amp fuse in your battery compartment, on the wall upper right side. Pop off the plastic cover and see if it’s blown
 
Joined
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Messages
897
Location
Prince William, VA
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Ventana 4326
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TOW/TOAD
2020 Ford F-150
Checked generator breaker. It’s set to on.
Looking for 300amp fuse...not finding anything. It’s in the house battery bay?
 
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If you have surge protectors such as at the pedestal remove it. If you have a voltmeter check the pedestal.
 
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I was assuming you’re dry camping since you mentioned the generator is your power source. Here’s a picture of that 300 amp fuse in the battery bay. Ive blown it when I’m running too many appliances concurrently, microwave and AC’s for instance.
 

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Joined
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Messages
897
Location
Prince William, VA
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Newmar
RV Model
Ventana 4326
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TOW/TOAD
2020 Ford F-150
No voltmeter so I’m a bit weary of plugging my coach into a pedestal with no protection without being able to check if first
 
Joined
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Location
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Here’s an old pic with cover off- I think it turned pink if blown
 

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Joined
Nov 17, 2019
Messages
897
Location
Prince William, VA
RV Year
2020
RV Make
Newmar
RV Model
Ventana 4326
RV Length
43
TOW/TOAD
2020 Ford F-150
Found the 300amp fuse. Thanks @VTPete.
Looks fine to me.
 

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Joined
Nov 17, 2019
Messages
897
Location
Prince William, VA
RV Year
2020
RV Make
Newmar
RV Model
Ventana 4326
RV Length
43
TOW/TOAD
2020 Ford F-150
I’m looking at the Magnum manual for the fault showing. I’m thinking maybe my batteries are too low so the magnum is rejecting shore power, which is what why the watchdog isn’t throwing errors but instead just clicking off, then trying again a minute later.

I can’t seem to get them to charge though. I turned in the generator, didn’t see them
Budge. Turned on the engine, nothing.
 

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Joined
Jan 26, 2020
Messages
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Location
Lakeside, CA
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Ford F150 King Ranch
So the fuse was white when you checked?
1582855701295.png
 
Joined
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Messages
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Location
Prince William, VA
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TOW/TOAD
2020 Ford F-150
@VTPete The picture I attached was taken just a few moments ago. It looks white to me, though I do see a touch of pink. Still, the pic you had the whole thing was pink.
 
Joined
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Messages
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Prince William, VA
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2020 Ford F-150
Can I try to use the boost switch to jump the house batteries from the chassis? Is that possible? Ill-advised?
 
Joined
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I think that works the other way around - the house boosts the chassis batteries.
 
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@MapNerd … My 300 amp fuse blew once and I did not know about it turning pink if bad. I think I used a meter to check it. That's the only thing I could think of at the time. I now carry an extra one of them.

FLSteve
 
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Joined
Jan 26, 2020
Messages
115
Location
Lakeside, CA
RV Year
2017
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Newmar
RV Model
Ventana LE
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TOW/TOAD
Ford F150 King Ranch
It had a trace of pink- but could have been anti corrosion spray. I’d get a meter on it if you can - if the house /inverter side is dead you’ll have your answer. I’ve carried a spare ever since this happened to me when I first got the rig.
 
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West Palm Beach Fl
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Would starting g you engine solve the issue?
 
Joined
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Messages
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Location
Midlothian, VA
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2017 Chevy Colorado
Fulltimer
No
Sounds like the transfer switch may be shot.
 
Joined
Nov 17, 2019
Messages
897
Location
Prince William, VA
RV Year
2020
RV Make
Newmar
RV Model
Ventana 4326
RV Length
43
TOW/TOAD
2020 Ford F-150
Did a continuity test on the 300amp, put a probe on the metal holding each end and got tone,
 
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