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Old 05-26-2018, 10:55 AM   #1
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Not getting enough juice

Cherokee Patriot 274dbh
Typing on phone so only listing known details....rv working fine, all of a sudden lights dimming and ac compressor no longer running. Eventually power got less and less running less stuff. Checked with voltage meter.... results are

120v @ plug in site
120v @ main breaker
120v @ ac breaker
Zero v to battery

Fridge has worked ntermittently. When power is disconnected from the battery power to the fridge stops.
Shouldn't fridge run without battery power.

Any ideas what else I should check? What could issue possibly be?
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Old 05-26-2018, 11:13 AM   #2
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If battery voltage low it could be converter. Check converter for fuses. It converts 110 to 12v to keep them charged. I had same symptoms and converter was bad
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Old 05-26-2018, 11:18 AM   #3
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Forgot to mention you could try battery charger to keep charged. Fridge will not run without 12v
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Old 05-26-2018, 11:58 AM   #4
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So if converter is bad would cause ac to not work? It's my understanding that the AC does not require the battery.
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Old 05-26-2018, 12:04 PM   #5
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Thermostat runs off the battery.
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Old 05-26-2018, 12:25 PM   #6
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heater/air conditioner Thermostat and control boards, fridge control board, water heater control board and other basic stuff all run off of 12 volt power that is provided either by a charged battery, a converter plugged into 120 volts AC, or both.

Should be easy to track down and repair. Factory converters are pretty much junk.
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Old 05-26-2018, 01:58 PM   #7
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It maybe a short. It happened to my Forest River Sunseeker Mercedez 2017. There was a short and it took a year to find it. The dealer worked on it 4 times and never found it.
We found it last March My son. It was the tow hitch wiring all rusted and wet. WE cut the wires and installed a new one. Greased it with electrical grease Water proofed. All works well now.
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Old 05-26-2018, 07:35 PM   #8
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A bad battery will also pull down the converter. Try disconnecting the negative terminal at the battery and see if the converter works properly and powers your 12 volt circuits.

Video link:

https://youtu.be/4X4fbVTm5pE
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Old 05-26-2018, 07:47 PM   #9
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Have the battery load tested
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Old 05-26-2018, 07:49 PM   #10
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If you have one, ensure your battery disconnect switch is not engaged..
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