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01-13-2022, 04:02 PM
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#1
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Junior Member
Join Date: Jul 2021
Location: Snyder
Posts: 18
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Electric Mystery
I've had my 50amp rv hooked up to 15 amp shore power for a week or so without checking on it. Today I noticed that nothing electric worked in the camper and the battery was dead. The power from shore (my house) seems to be running fine. I hooked up a generator and all the wall plugs, tv, microwave have power but no power to lights and the electric fridge. I hooked up power from my truck to the trailer connection and I get power to the lights and fridge. No breakers are flipped. No fuses blown as far as I can tell. I did accidentally reverse the polarity on the charged battery for a few minutes about a week ago before I brought the camper home, hooked it up to shore power, and all this trouble began. Ideas? Did i fry the converter when I reversed the battery polarity?
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01-13-2022, 04:15 PM
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#2
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Senior Member
Join Date: Aug 2021
Location: Eugene
Posts: 314
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Quote:
Originally Posted by bsmith143
I did accidentally reverse the polarity on the charged battery for a few minutes about a week ago before I brought the camper home, hooked it up to shore power, and all this trouble began. Ideas? Did i fry the converter when I reversed the battery polarity?
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You probably toasted the reverse polarity fuses in your main breaker panel.
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01-13-2022, 04:23 PM
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#3
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Senior Member
Join Date: Aug 2020
Location: Upper Chesapeake Bay
Posts: 4,840
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Quote:
Originally Posted by Essvar
You probably toasted the reverse polarity fuses in your main breaker panel.
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I agree with the above
__________________
2020 Cougar 315 RLS
2020 Ram 3500 6.7HO 4.10 Dually Aisin
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01-13-2022, 04:30 PM
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#4
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Junior Member
Join Date: Jul 2021
Location: Snyder
Posts: 18
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Where am I missing seeing these darn converter fuses? there is no fuse marked for the converter on the main fuse assembly. my local camper repair guy told me to remove the plastic plate around the fuses to find the converter fuse. I did so and found no fuse. I have removed enough stuff to locate the converter and the wiring in behind the fuse assembly and breaker box. I find no other fuses to check. One of the breakers is marked "Con." I don't know if this is the converter or what it is, but its a breaker and not a fuse.
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01-13-2022, 04:35 PM
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#5
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Senior Member
Join Date: Aug 2020
Location: Upper Chesapeake Bay
Posts: 4,840
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Did you see the video I just posted above?
Here’s an example…yours may be a little different
__________________
2020 Cougar 315 RLS
2020 Ram 3500 6.7HO 4.10 Dually Aisin
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01-13-2022, 04:45 PM
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#6
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Junior Member
Join Date: Jul 2021
Location: Snyder
Posts: 18
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I did watch the video. Thanks a bunch for posting that. That is almost exactly what my local repair guy showed me to look for, but I tell ya there is no reverse polarity fuse that I can find. I took apart the fuse box and looked in behind, etc. I even found the converter and traced the wires to the fuse box. I find no fuses.
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01-13-2022, 04:46 PM
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#7
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Senior Member
Join Date: Aug 2020
Location: Upper Chesapeake Bay
Posts: 4,840
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Quote:
Originally Posted by bsmith143
I did watch the video. Thanks a bunch for posting that. That is almost exactly what my local repair guy showed me to look for, but I tell ya there is no reverse polarity fuse that I can find. I took apart the fuse box and looked in behind, etc. I even found the converter and traced the wires to the fuse box. I find no fuses.
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Maybe you can post a picture of the fuse box or provide a model number off of it
__________________
2020 Cougar 315 RLS
2020 Ram 3500 6.7HO 4.10 Dually Aisin
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01-13-2022, 04:48 PM
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#8
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Senior Member
Join Date: Dec 2019
Location: Trinidad,TX
Posts: 975
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Can you post a photo of your converter? They are usually red fuses, 30 or 40 amp.
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Woody
Cedar Creek Lake, Texas
2019 Laredo 290 SRL
2019 Ram 2500, 4x4, Cummins diesel
Andersen hitch
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01-13-2022, 04:58 PM
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#9
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Member
Join Date: Mar 2018
Location: Sechelt, BC
Posts: 66
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You say you traced the wires from fuse panel to converter, Is it possible that the fuses are on the converter instead of the fuse panel?
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Gord & Deb
2008 GMC SIERRA 2500HD DURAMAX
2015 Keystone Bullet 210RUDWE
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01-13-2022, 05:11 PM
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#10
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Junior Member
Join Date: Jul 2021
Location: Snyder
Posts: 18
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Could be, Gord. I will try to post pics.
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01-13-2022, 05:19 PM
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#11
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Junior Member
Join Date: Jul 2021
Location: Snyder
Posts: 18
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01-13-2022, 05:21 PM
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#12
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Senior Member
Join Date: Aug 2020
Location: Upper Chesapeake Bay
Posts: 4,840
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I could be wrong but I thought I read on the forum that they are sometimes on the back of the box ?? Or on the converter behind the fuse box? Don’t hold me to that though…I’d try the converter as others have said
https://vimeo.com/15713417
__________________
2020 Cougar 315 RLS
2020 Ram 3500 6.7HO 4.10 Dually Aisin
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01-13-2022, 05:25 PM
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#13
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Junior Member
Join Date: Jul 2021
Location: Snyder
Posts: 18
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heres the rest of the pics. Does on the back of the box mean on the back of the converter itself? Its attached with screws and i didn't remove it to look on the whole thing. I can remove it to look around on it if I need to.
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01-13-2022, 05:29 PM
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#14
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Senior Member
Join Date: Aug 2020
Location: Upper Chesapeake Bay
Posts: 4,840
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Looks like you can possibly remove those two screws in the wooden panel next to your fuse box to get to the converter From your picture…edit: looks like you beat me to it
__________________
2020 Cougar 315 RLS
2020 Ram 3500 6.7HO 4.10 Dually Aisin
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01-13-2022, 05:31 PM
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#15
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Senior Member
Join Date: Aug 2020
Location: Upper Chesapeake Bay
Posts: 4,840
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Quote:
Originally Posted by bsmith143
Attachment 37859
Attachment 37860
heres the rest of the pics. Does on the back of the box mean on the back of the converter itself? Its attached with screws and i didn't remove it to look on the whole thing. I can remove it to look around on it if I need to.
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I’d look all around…I’m sure someone will chime in..I’ve never had to access mine yet
__________________
2020 Cougar 315 RLS
2020 Ram 3500 6.7HO 4.10 Dually Aisin
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01-13-2022, 05:32 PM
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#16
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Member
Join Date: Mar 2018
Location: Sechelt, BC
Posts: 66
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Just from looking at your fuse panel photos, I see two 12v negative conductors and two 12v positive conductors on the fuse panel. One conductor each pos and neg would come from battery and one conductor each pos and neg will come from converter, which to me suggests that the reverse polarity fuses are located on the converter.
__________________
Gord & Deb
2008 GMC SIERRA 2500HD DURAMAX
2015 Keystone Bullet 210RUDWE
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01-13-2022, 05:37 PM
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#17
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Junior Member
Join Date: Jul 2021
Location: Snyder
Posts: 18
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thanks Gord. I will stick my fat head and arms in that tiny hole and see if i can get that converter loose. Gonna be a challenge.
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01-13-2022, 05:38 PM
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#18
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Senior Member
Join Date: Aug 2020
Location: Upper Chesapeake Bay
Posts: 4,840
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See the fuses in the picture?..might be able to reach them from the far side
Buy four of them and keep some spares taped in an envelope behind the panel
__________________
2020 Cougar 315 RLS
2020 Ram 3500 6.7HO 4.10 Dually Aisin
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01-13-2022, 05:41 PM
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#19
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Junior Member
Join Date: Jul 2021
Location: Snyder
Posts: 18
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oh, those hidden rascals. Thanks so, much folks. I will attack this in the morning and let ya'll know how it turns out
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01-13-2022, 06:10 PM
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#20
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Member
Join Date: Mar 2018
Location: Sechelt, BC
Posts: 66
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Quote:
Originally Posted by bsmith143
oh, those hidden rascals. Thanks so, much folks. I will attack this in the morning and let ya'll know how it turns out
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Once you do get it back up and running, and you will. It might be a good idea to get your battery tested. Even though nothing was turned on in the trailer the parasitic loads will have drawn the battery down to a point were it might not take a full charge any more. Just before you disconnect the battery I would suggest putting some red tape on the cable that goes to the positive terminal on the battery and some black tape on the cable that is on the negative terminal.
__________________
Gord & Deb
2008 GMC SIERRA 2500HD DURAMAX
2015 Keystone Bullet 210RUDWE
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