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Blown Fuse

josten367
Explorer
Explorer
We have a Palomino Puma 295KBH that has a fuse right off the battery that goes up into the camper. The 15 amp fuse keeps blowing when I plug it into the truck or into the house. I couldn't even get my slides in with the fuse out on batteries. So I put a 30 amp fuse in there and it worked long enough to get the slides in. Does anyone know what this fuse is for and what it goes too?
2012 Palomino Puma Bunkhouse 5th Wheel 295KBH
2003 Chevy Silverado 2500HD Crew Cab 4x4 Gas with Flowmasters
B&W Companion 5th Wheel
11 REPLIES 11

laknox
Nomad
Nomad
josten367 wrote:
The fuse was fine until something caused the home GFI to trip when it was plugged into our home. That's when the fuse started blowing. I need to find the wire diagram to find out what it might go to and see what might be causing this. Like I said if I plug the trailer into the house that 15 amp fuse blows also.


Wiring diagram for an RV? Surely (don't call me Shirley) you must be joking. I doubt there's any 2 RVs of the same exact model wired more than 75% the same way. (cynic mode off)

Lyle
2022 GMC Sierra 3500 HD Denali Crew Cab 4x4 Duramax
B&W OEM Companion & Gooseneck Kit
2017 KZ Durango 1500 D277RLT
1936 John Deere Model A
International Flying Farmers 64 Year Member

josten367
Explorer
Explorer
Yes, this is a black wire that goes to the top of the camper. The fuse is crimped on and is blue.
I think that my radio/dvd/cd player is what is running down my battery because there is no off switch on it.
2012 Palomino Puma Bunkhouse 5th Wheel 295KBH
2003 Chevy Silverado 2500HD Crew Cab 4x4 Gas with Flowmasters
B&W Companion 5th Wheel

upstech76
Explorer
Explorer
The problem is that your converter can supply 30 or 40 amps of current to a dead battery which is enough to blow the fuse you have installed. A fuse doesn't care which way the current is moving it will blow anytime the current rating is exceeded. I would suggest using a good battery charger to see if you can charge the battery. At the voltage you stated it is really dead.
2013 Forest River Puma 28'

josten367
Explorer
Explorer
Yes, this is a black wire that goes into the ceiling and I assume that it goes to the converter. I can't see inside the converter but I will remove it this weekend and see what I find.
The other day when this was happening I did measure the voltage of the battery and it was about 7.5 volts DC. So that might be the issue with drawing more amps because its low. I have had this battery for 2 years now but I didn't maintain it over the winter last year. I will remove the battery and have someone test it to see if there are issues with it. Then try to get a trickle charger and see if this happens again with a full charge on it.
2012 Palomino Puma Bunkhouse 5th Wheel 295KBH
2003 Chevy Silverado 2500HD Crew Cab 4x4 Gas with Flowmasters
B&W Companion 5th Wheel

upstech76
Explorer
Explorer
Just a thought but if the GFCI was tripped for any length of time and allowed the battery to run down its possible when you plug shore power or connect the 7 pin plug you are putting more than 15A of power into the battery due to its discharged state. Do you have a standalone battery charger you can use to top off the battery? A volt meter to check the approximate charge state of the battery?
2013 Forest River Puma 28'

chipper
Explorer
Explorer
Sounds like either a defective battery or convertor drawing too much current.
gene

mileshuff
Explorer
Explorer
GFI's trip when the current drawn on the hot side is different than current drawn on the nuetral side indicating some current being drawn on the ground line. If your homes GFI is tripping then there is leakage somewhere to ground. It's not a dead short since a 30amp works. Be careful using too large of a fuse and melt wire or insulation instead!
2014 Winnebago 26FWRKS 5th Wheel
2007.5 Dodge 2500 6.7L Diesel
2004 Dodge Durango Hemi 3.55 (Used to tow TT)

josten367
Explorer
Explorer
That might be true about the leak. I tested the battery with volt meter and it was at 7 volts.
I will look at the wire tonight and let you know what color it is. can't see the converter very well with out taking it apart. I will try that also.
2012 Palomino Puma Bunkhouse 5th Wheel 295KBH
2003 Chevy Silverado 2500HD Crew Cab 4x4 Gas with Flowmasters
B&W Companion 5th Wheel

deleted-2
Explorer
Explorer
Sounds like 12 volt ground leak.
How large is the wire that this fuse is on?

If you can see the AC to DC convertor easily there might be something grounding the output...say water dripping on it, corrosion or another reason for the high impedance ground leak.

josten367
Explorer
Explorer
The fuse was fine until something caused the home GFI to trip when it was plugged into our home. That's when the fuse started blowing. I need to find the wire diagram to find out what it might go to and see what might be causing this. Like I said if I plug the trailer into the house that 15 amp fuse blows also.
2012 Palomino Puma Bunkhouse 5th Wheel 295KBH
2003 Chevy Silverado 2500HD Crew Cab 4x4 Gas with Flowmasters
B&W Companion 5th Wheel

YC_1
Nomad
Nomad
Sounds like your main fuse and 15 amps is not enough. A 30-40 amp would be more appropriate. Could be it was the only fuse available at some point in time.
H/R Endeavor 2008
Ford F150 toad >Full Timers
Certified Senior Electronic Technician, Telecommunications Engineer, Telecommunications repair Service Center Owner, Original owner HR 2008