Help: battery terminal wire

[billiards]

Changed old batteries for fresh....main cables are fool proof, but forgot where the small eyelet black wire was attached.......neg or pos. Thanks

[Rich W]

All black? No red on the terminal at all??
A black wire is probably going to ground. Do you have an electric tongue jack

[Al and Missy]

My trailer is in storage, so I can't check, but I had a black wire attached to the plus terminal. 99.9% sure it was electric tongue jack. Follow the wire. If it goes to jack, it goes on plus.

[TG Twinkie]

Black = Positive
White = Negative
In most RV's

[Mexray]

This issue is somewhat confusing for older RV's...

12 volt wiring colors used to be:

Pos = Red
Neg = Black

As RV mfg's began to conform to RVIA standards they changed their wiring colors to conform:

Pos = Black
Neg = white

As you can see, the BLACK went from Neg (old) - to Pos (new, current) in wiring harness'...

I found this out in grand style when installing the battery in our 2000 vintage Lance truck camper...Whoa - no red Pos wire - what gives...till I looked at the wiring diagram...Surprise on me...!

[Zil]

Best advice is to follow out the wire and find where the other end is attached.
You could check for continuity to see if it grounds.

[billiards]

Thanks......a million, jack