Originally Posted by billclay2004lex
I just want to install two 6volt batteries correctly! The battery cables from the MH aren't marked and they are all red!
I think a little more information will help. This usually takes an in-person approach to truly find the correct wiring configuration. If you are unsure how to check with 100% accuracy
and your coach isn't capable of being moved then call a mobile RV tech and have them do it.
1. Are the old batteries still connected correctly? Then its easy to ID the neg and pos based on battery terminal.
2. Is it possible to follow the cables? A cable leading to the chassis is negative. The negative battery cable usually doesn't go too far before connecting to the frame.
3. If there are no existing batteries to use as a map and no way to follow the wires, then use your multimeter and check for continuity. Read through your digital multimeter's instructions on how to check for continuity.
Not that you asked, but whatever you do, please don't do the backyard mechanic's "SPARK" test.
Once you ID which is which, make sure to label them correctly and take pictures that you can store in the coach for future reference.