Which batteries are which ?

racer99 wrote:
You may want to look under the hood to see if there is a 12 volt battery there then they may all be 4 house batteries --unless it is a Diesel Rig then usually have two 12 volt batteries for starting-That would mean two 12 volt for starting and 2 6 volt house batteries --It would help if we had more info-Unless it is a trailer which would make it all house batteries-Profile shows a fifth wheel so I am confused as usual--Rich

Rich, I own a Winnebago and my chassis battery is 12V and the coach batteries are 2-6V and in my Winnebago in the battery box Winnebago installs the chassis battery closer to the engine! I agree with your post!

The BOTTOM are the chassis hook ups. This is due to the post connections. Those type connections are ALWAYS chassis post connectors. Doug

From the photos I can not say, But how to figure it out I can

On the top photo there is a single lead running off the right battery.

First, unplug and/or turn off generator if plugged in or generator running.

Then, turn everything on. (Battery disconnects in the "Connected" position, Turn on a light in the MH, Just one).

CAREFULLY (be sure to NOT short the wrench to anything) remove the nut from that lead, Now remove the lead that runs off to "Somewhere" other than the left hand battery.

IS the light still on Wait 2 minutes, is light still on? if so try to turn on a chassis feature, (Headlights, Marker lights, Or start engine)

Expecting no joy there.

If the light went off.. Re-connect the lead,, Light back on now? GOOD.


If the condition of this lead affects the light inside the "House" it is a HOUSE lead

If it prevents starting, chassis.

That simple.

Also note that when you do figure it out that some accessories may still operate from the chassis batteries. In ours, the dash stereo has a selector switch but the step cover and vehicle alarm are powered by the chassis batteries as are the propane and CO alarms.

And has been mentioned, clean that red terminal. Take the cable off and cleat it all before putting it back on. Worth doing them all. DISCONNECT THE NEGATIVES FIRST AND RECONNECT LAST.

You've got a good bit of corrosion on the top left battery terminal. Need to be kept clean.Will affect the integrity of the connection.

You may want to look under the hood to see if there is a 12 volt battery there then they may all be 4 house batteries --unless it is a Diesel Rig then usually have two 12 volt batteries for starting-That would mean two 12 volt for starting and 2 6 volt house batteries --It would help if we had more info-Unless it is a trailer which would make it all house batteries-Profile shows a fifth wheel so I am confused as usual--Rich

I'd say the bottom are starting. You don't have to disconnect anything if you have a voltmeter. Have someone try to start it and watch the voltage drop at the battery.

Blaster Man wrote:
Can't see the pics, but normally the truck batteries are 12v and the house batteries are 6v.

My friends Monaco has 12V house, with not enough clearance to swap to any 6V (we've measured, more then once)

Can't see the pics, but normally the truck batteries are 12v and the house batteries are 6v.

Coach batts and house batts same. Just different names.
Chassis batts for running engine.