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No battery power

rmnpcolorado
Explorer
Explorer
We have a 2011 Jayco X213 that has had battery power issues intermittently since it was new. Rarely do we boondock, but even without, we run the fridge while on the road and turn lights on, water pump, etc. Last summer we stayed in NF campgrounds on battery and had no issues.

Tonight=no power whatsoever. The battery is fine and charged. But thereโ€™s no power at all, not even from the truck which I would think we would have even if there was a weak battery. It has to be a wiring issue somehow, and everything works fine on shore power. Thoughts? There was power when we initially took it out of the shed this spring. And Iโ€™ve seen weak lights at times, but now nothing at all. Everything looks connected from what I can see, but I wonder if somewhere thereโ€™s a loose connection?
2020 Ford F-150 3.5L w/Max Tow
2023 Riverside RV Intrepid 240BHi
10 REPLIES 10

BB_TX
Nomad
Nomad
If you have an auto reset circuit breaker in the battery positive line, that would definitely be a suspect. They are very cheaply made and known to fail.

Sjm9911
Explorer
Explorer
What they said allready, check the battery for power then follow the line. There will be an inline fuse or autoresetting fuse (they do go bad). Check to see if power is getting through that. Put a multi meter on your inside fuse, sometimes they look good but aren't. Clean up the ground conections.
2012 kz spree 220 ks
2020 Silverado 2500
Equalizer ( because i have it)
Formerly a pup owner.

rmnpcolorado
Explorer
Explorer
Without digging into it yet, my guess is that there is indeed corrosion in there. Our in-line fuse is supposed to have a cover on it, but that was connected by a little rubber cover which has been gone for years. So when I pull the fuse in between trips, that fuse โ€œboxโ€ is exposed to the elements. Iโ€™m assuming I can find a replacement fuse box to upgrade that and splice it in?
2020 Ford F-150 3.5L w/Max Tow
2023 Riverside RV Intrepid 240BHi

wanderingaimles
Explorer
Explorer
On 12 volt systems the ground is the most frequent issue, not just at the battery connection, but the other end of that cable and where it attaches to the trailer chassis. A quick check is to use a jumper cable from Battery neg to the metal at the hitch. 10 second check, and eliminates half the possibilities.

enblethen
Nomad
Nomad
Follow the positive cable lead from the battery. I believe you will find a circuit breaker that has failed. It is normally located at the junction of the battery, rig's wiring system and the umbilical cord from TV.

Bud
USAF Retired
Pace Arrow


2003 Chev Ice Road Tracker

I had the same perplexing issue a couple of TTs ago. Exactly as you describe.
After pulling what's left of my hair out trying to figure it out, I decided to follow the 12V positive wire. I probed it at the hitch where it went under and into the TT. Power there, but nothing inside at the converter fuse panel.

I got on my back and slid under the front, behind the frame cross member where the wiring went in.

I shone a flashlight up to the bottom of the floor, right behind the front frame and discovered a cluster of connections hidden in there. One of them was an inline fuse for +12V. I opened the fuse holder and Bingo! There it was. The fuse was not blown, but the holder and ends of the barrel fuse were corroded, just enough to make the connection intermittent.
I cleaned up the connections, put it back together and voila! End of problem.
It never happened again.

With any luck, perhaps you can find a similar issue.
Try tracing your +12V feed from the batteries all the way back to the converter.

When plugged into shore power, the 12V comes from the converter, regardless of whether the battery works or not.
2007 GMC 3500 dually ext. cab 4X4 LBZ Dmax/Allison - 2007 Pacific Coachworks Tango 306RLSS
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rmnpcolorado
Explorer
Explorer
BB_TX wrote:
Did you by chance turn your battery disconnect switch?
Good thought, but we donโ€™t have a battery disconnect switch. We physically pull the fuse, and the fuse is still good.
2020 Ford F-150 3.5L w/Max Tow
2023 Riverside RV Intrepid 240BHi

BB_TX
Nomad
Nomad
Did you by chance turn your battery disconnect switch?

gchackett
Explorer
Explorer
Sounds like a bad ground or possible positive power block issue. Check where the wires coming off the battery go
2002 Chevrolet Suburban 2500 8.1L
2000 Shasta Pheonix 268 Bunk House

Grit_dog
Nomad III
Nomad III
Intermittent issue is generally a loose connection or bad/loose or corroded ground.
Where to start? Both ends of the big cables from battery to converter.
2016 Ram 2500, MotorOps.ca EFIlive tuned, 5โ€ turbo back, 6" lift on 37s
2017 Heartland Torque T29 - Sold.
Couple of Arctic Fox TCs - Sold