Originally Posted by Gunclubchamp
You answered my question earlier, thanks
You are welcome, but as Bubbles pointed out, are you sure it's on the negative cable (which it could be)?
The reason I ask, is RV battery wiring color can fool you. If you have a black and white wire going to the battery, the BLACK is usually the POSITIVE wire, and the white is the negative wire. It's more like the way a house is wired accorded to color schemes.
It kind of runs counter intuitive to what you are used to on a vehicle...but you need to know this in case you ever change your battery or such. If you connect the battery wires backwards, you will blow the reverse polarity fuses to your converter.
Now to just add more to the confusion, if your RV battery wires are only black and red, then the opposite holds true and it's like on your vehicle. The red is positive and the black is negative.