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Old 07-20-2020, 08:00 AM   #1
2009 F450 2015 Cardinal
 
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No 12V power this morning

Woke up this morning with no 12 volt power in my 5th wheel. We are boondocking and the critical piece is it has the fridge/freezer off. Batteries are tested and fine. Battery switch is ON. Call is in to Cardinal tech help. Thanks

It is a 2015 Cardinal 3875FB
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Old 07-20-2020, 08:18 AM   #2
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Did you check the resettable breaker under the frame near the hitch?
Is this the original Battery?
How are you testing the battery?
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Old 07-20-2020, 08:26 AM   #3
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Volt meter working from the battery toward the distribution panel until you find the open circuit. Could be a resettable fuse, hard fuse, loose connection, bad battery switch, bad ground, any number of fun things to check. What is the actual battery voltage? If you fire up a genny do you get 12 volts back from the converter?
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Old 07-20-2020, 08:33 AM   #4
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Being a fifth wheel the resetable breaker will likely be in or near the battery compartment, not near the hitch. It will have a button push.
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Old 07-20-2020, 08:44 AM   #5
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As mentioned, start at the battery, testing with a voltmeter and work your way towards the power distribution box.

You have to start with the basics.
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Old 07-20-2020, 08:52 AM   #6
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I tested the batteries with a volt meter. Also, my solar controller agrees they are at 12.65 I do have 12volt power with the generator running. I don't know what the resettable breaker looks like. Anybody have a picture?
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Old 07-20-2020, 08:53 AM   #7
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Quote:
Originally Posted by AntonJ View Post
I tested the batteries with a volt meter. Also, my solar controller agrees they are at 12.65 I do have 12volt power with the generator running. I don't know what the resettable breaker looks like. Anybody have a picture?
Here it is....

https://www.forestriverforums.com/fo...et-154141.html
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Old 07-20-2020, 08:55 AM   #8
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As a confounding or maybe illuminating factor, I had let the propane tank run out. Could that have tripped something with the refrigerator and water heater continuing to try to reignite the propane?
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Old 07-20-2020, 09:25 AM   #9
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I cannot find the resettable breaker so far. Also, I wanted to insert an image to show you all what the gizmo in front of my battery bank looks like, but I don't know how to do that. The insert an image icon requires a URL and I cannot do a simple copy/paste. Feeling particularly dumb this morning...
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Old 07-20-2020, 09:47 AM   #10
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if you're on a PC can click (or touch) the 'Go Advanced' button at the bottom of the Quick Reply window and you can add pictures from there by searching your local device.
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Old 07-20-2020, 09:52 AM   #11
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Read here to post photo. Post 7.

http://www.forestriverforums.com/for...html#post49621
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Old 07-20-2020, 10:11 AM   #12
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I think this is the 200amp fuse / it is intact

I'll see if the image loaded.
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Old 07-20-2020, 10:28 AM   #13
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Did you test that fuse with a meter?
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Old 07-20-2020, 10:33 AM   #14
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Yes that is a fuse, not a circuit breaker. Test it as recommended above, and keep testing a you go downstream until you find the break. Your circuit breaker is apt to be covered by the red rubber shield as pictured above. Peel that back to test the power or access the reset button the side.
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Old 07-20-2020, 11:27 AM   #15
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Issue resolved

OK, Thanks for all your help. And thanks to Don McWilliams the Cardinal rep at Forest River. In the close up pic, the knife breaker on the left was the culprit. The one on the right controls the hydraulics. It was not fully tripped, but I thought I had tripped and reset it in an earlier attempt to resolve the issue. But, when I did it a second time it reset the system and all is well that ends well. The crazy thing is when it is fully tripped it is really easy to see, but it was not visibly tripped yet responded to a reset.
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Old 07-20-2020, 11:46 AM   #16
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Thanks for letting us know what you found. I'm glad it was as easy as resetting a breaker, even if it was a bit of a challenge to find.
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Old 07-20-2020, 12:07 PM   #17
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Thanks

Also, thanks to the folks that held my hand through the picture posting part too.

BTW: I don't know, but I do suspect the running the system out of propane had something to do with the breaker tripping. After spending a decade (the '80's) in Law Enforcement, I am deeply suspicious of coincidences.
Maybe the frig or the hot water heater continuously trying to reignite?
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Old 07-20-2020, 12:09 PM   #18
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Thanks for letting us know what you found. I'm glad it was as easy as resetting a breaker, even if it was a bit of a challenge to find.
Things like that are always easier to find the next time

This would be a nice thing to add you a new RV PDI/Checklist.

Location of ALL circuit breakers and hidden fuses. ALL OF THEM.
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Old 07-20-2020, 12:12 PM   #19
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I was definitely the tree for a while this morning!
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Old 07-20-2020, 12:22 PM   #20
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There is a thermal fuse located in the refrigerator someplace near the propane ignitor. Mine was attached to a red wire that had some heat shrink on it. I had the same problem and was able to replace it and fixed the problem. Fuse type SF152E. Ordered on Amazon for $7.41 for a package off 10.
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