Putting new batteries in Fuel 305, got a little arc, now there is clicking near duel batteries on front of trailer?

[Mitch6591]

There is a white wire, about a 4 gage and a black one. Black went to black but when white was on red, got arc.
are the both a ground, common ?

 

[Mitch6591]

When the breaker goes on and off, it is controlling the thermostat inside the rig?

 

[Mitch6591]

Which are the two RV battery wires? are the the black and white number 4s

 

[cookie]

More information is needed.
Are you using two 12 volt battery's or two 6 volt?
The breaker going off and on may be trying to protect your system from incorrect battery installation.
Since you mentioned an arc when hooking up you may have blown fuses in your converter. Once you get everything hooked up correctly you will need to access your converter and check those fuses.

Peace
Dave