Battery disconnect in "off" position, anything connected?

Pretty easy to follow the wires. If the hot side of the battery switch is the only wire going to the battery bank then the switch kills all of the trailer. The only way anything is getting power is if a second wire is going into the switch bypassing the switch inside to the hot terminal.

The Winnebago Outlook I had for 10 years had the cutoff switch disconnect everything.

The Airstream FC 23FB I have now leaves the propane detector, solar chargers, breakaway switch, tongue jack and inverter powered. I moved the hot wire for the propane detector so it cuts off with the disconnect. I put a separate disconnect switch on the inverter. I left the tongue jack, breakaway switch and solar chargers directly connected to the battery.

It all depends on how the manufacturer built it. There is no standard.

My 5th wheel
Disconnect OFF kills DC to Main DC Dist Panel only. It is in the Battery POS cable.
Slides, rear stabilizers, front landing gear legs and LP Detector still have power. They are ALL wired directly to battery


Easy to check yours...just check battery POS post, cable and what is connected to POS post and where is disconnect attached.

downtheroad wrote:
Trailer here....only the tongue jack (it's wired independently)
Everything else is off.
But with a quick and simple test with a multi-meter for each system will give you the answer for your unit.

on mine the jack and breakaway power to the brakes is still connected.


But confirm on YOUR trailer. mfg may or may not wire the disconnect to disconnect everything.

Trailer here....only the tongue jack (it's wired independently)
Everything else is off.
But with a quick and simple test with a multi-meter for each system will give you the answer for your unit.

Alarms and steps are sometimes wired to chassis and/or coach batteries - I transferred them all exclusively to the coach batteries as dead chassis batteries is bigger problem than dead coach battery.

Alarms and steps are sometimes wired to chassis and/or coach batteries - I transferred them all exclusively to the coach batteries as dead chassis batteries is dangerous if your stuck in the middle of nowhere.

Depends on the rig's manufacturer and model
In the case of a MH,
Step may have power off chassis battery
Some chassis will have power to dash
Trailer/5ers could have power to slides and tongue jack.

I would suggest you add your rig to profile for better responses.