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Assuming he’s got six point hyd system... the resettable breaker is one and the same for ALL jack functions and ALL hyd slide functions... DC power goes from battery thru one resettable breaker directly to the dual polarity solenoid on the hyd pump motor..
He states it works with shore power but not with truck hooked up and no shore power...
When hooked to truck the current capability is no where near what the output is coming off the converter in the RV...wire harness gauge is not large enough to carry much amperage from truck to RV
If the resettable breaker were open the jacks would never operate with or without shore power
I’d be removing the DC connections at the battery and checking for corrosion on the under side ...
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