Darklock wrote:
This may be a dumb question, but when on shore power do the lights still work off battery or the 120? I assume battery or inverter.
RV interior lights are 12V not 120V, they work directly from the battery (IE no 12V to 120V inverter involved).
So, in theory, your interior lights are supposed to work directly from the battery when the RV is not attached to any shore or generator power through the shore cord provided you have a charged 12V battery attached.
When shore power is plugged in, the "converter" (which is a fancy name for battery charger) steps down the 120V AC to approx 12V DC (this in reality is approx 13.6V-14.4V depending on charging stage the converter is at).
With most RV electrical systems you have your 120V and 12V distribution center (120V breakers and 12V uses fuses) and at the bottom of the distrubution center (hidden from view) is the "converter" section.
Converter output goes to the 12V fuse panel, there will be a fuse for the converter..
The fuse panel will have a wire that goes to the battery and within 18" of the battery there will be a little silver box with two "studs", one side the converter wire is attached and the other will go to the battery.
That silver box is a circuit breaker to protect the wiring from an accidental short..
Those breakers are out in the weather and do go bad.
In case of accidental reverse polarity connection of the battery, there may be additional fuse at the converter that will blow..