120v or 12v

OK so assuming there is a converter. when im plugged into shore power the batter will still run the 12v systems but will simultaneously be charging therefore wont run out? if there is no converter then I would need secondary charging? forgive me im not electrically inclined

Jebby14 wrote:
good to know. thanks for the quick reply. ill check the fridge tonight and adjust from there. refer means something totally different where I come from haha. once I find the converter is there a way to bypass a battery so the converter gives me 12v power for lights and fans direct from shore power? we pretty much always have electricity camping and id rather wait a season to pay for a battery.

With a converter you should have 12 volt power when plugged in. Might have a blow fuse (especially if positive cable touching trailer).

A 91 should have a converter. I would check to see if you have a blown fuse. If you do not have a battery make sure your positive battery terminal is not touching the trailer, otherwise it will just pop the fuse again. Like another poster said you need a battery for the breakaway switch when towing. Your lights, fan, heater all run off 12 volts.

If you have a VOM or test light you should have power to the battery terminals when plugged in, (Without battery).

If you put in a battery you need to disconnect when not using unless plugged in ( converter should keep it charged) otherwise it will be dead in about a week.

You need to make sure the converter is charging the battery.

OK guys good to know. guess I gotta find me a battery and learn to put it in.

Many older trailers had no convertor . only battery for twelve volt and 110 outlets for a battery charger and others . Must have battery , no need for convertor !

Here is a typical 30AMP trailer wiring configuration showing you what works on what.

You need to have a BATTERY INSTALLED before you move your trailer down a public road. There is a DOT REQUIREMENT that your trailer has a BREAKAWAY system setup to stop your trailer if it breaks loose from your truck. The electric brakes will use your on-board battery to stop the run-away trailer. Without a working BREAKAWAY system installed might go against your insurance claim big time if it was determined you were traveling without a battery and your run-away trailer caused damage to something or worse loss of life etc... I would get a battery installed... Most dealers install the GP24 SRM24 12VDC 85AH Deep Cycle Marine & RV Interstate battery. They cost around $90 I think... Best place to get one would be the RV dealers. They will have many in stock to put in their trailers for sale.




ignore the POWER INVERTER description in the bottom left of the pictorial. It should read 12VDC to 120VAC ...

Roy Ken

good to know. thanks for the quick reply. ill check the fridge tonight and adjust from there. refer means something totally different where I come from haha. once I find the converter is there a way to bypass a battery so the converter gives me 12v power for lights and fans direct from shore power? we pretty much always have electricity camping and id rather wait a season to pay for a battery.

Lights and fans are 12 volt and needs a converter 120volt to 12 volt and it should have one installed some where keep looking. The converter would keep a 12 volt battery charged which you need installed. The refer needs 24 hours to cool down. The higher the number the cooler the fridge.