Mystery Switch Next to Power Converter

[DetChief]

IO have a 2007 Thor America Jazz 3110BH Travel Trailer. There is a chrome pull switch that is next to the power converter, located beneath the refrigerator. Can anyone enlighten me as to the purpose of this switch?

I thought it may be a battery disconnect, but I see no difference with it pushed in or pulled out.

I also thought it may be a holding tank heater switch, but I have an enclosed underbelly and since there is also no light associated with the switch, I cannot discern what it is.

Many thanks in advance!

[BurbMan]

It's a battery cut off. It won't do anything while you are plugged into shore power since the converter is making 12v. Unplug from shore power so that lights etc run on the battery and watch all go dark when you pull the switch.

georider wrote:
I was told by the previous owner to pull the switch when plugged into shore power to prevent a power loop from the battery.

Taking the battery offline also prevents it from being charged by the converter when you are plugged in to shore power. Never heard of a "power loop" LOL.

[georider]

I was told by the previous owner to pull the switch when plugged into shore power to prevent a power loop from the battery.

[handye9]

I have one, too. Chrome push / pull switch, below refer, next to converter. Supposed to be a battery cut off switch, but, it doesn't appear to do anything.
Bought the trailer new, I was told during PDI, it is a battery cut off.

Doesn't matter if it is pushed in, or pulled out, it appears it does nothing. Tongue jack, radio, and power awning, still work either way. I haven't taken it out and checked the wiring. Maybe, it's not even hooked up.

I added a cut off at the battery.

[JJBIRISH]

Have you had this trailer since new or do you think this is an addition made by a previous owner…