The circuit breakers in your power panel, have nothing to do with lights, water pump, slide operations, etc. They only control 120 volt power, going to your A/C, microwave, and wall outlets.
The fuses control power to most of your 12 volt systems. The exception would be slide outs. They have 12 volt auto reset breakers.
Those breakers are not located in your panel with the fuses and 120 volt breakers. They are normally found underneath the trailer, attached to the frame, and probably near the battery. They
look like this.. Some have a button for manual reset. Some will reset when you disconnect and reconnect the battery.
Another possible cause of your problem, could be an internally shorted battery. With a battery connected, all 12 volt power goes through there. Even power coming from the converter. If the battery is shorted, it takes up everything the converter is putting out, no power gets through to lights, radio, water pump, etc, and the battery still does not charge.
Unplug shore power, pull the battery and take it to be load tested. Many auto parts stores, will test it for free. While the battery is out, plug back into shore power and try your slide.
First two suspects, I would look at, would be the battery and auto reset breakers. I'm leaning toward the battery because more than just the slide is affected. However, some trailers have an auto reset breaker between the battery and converter. If the battery and breakers check good, there's a wiring issue. Loose / corroded connections or chewed wires.
Please post what your findings and fix are.
18 Nissan Titan XD
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