battery wires not labled

[movinon2]

1977 HR presidential 3000 has no manual, don't know how to hook up 12v battery.

[GlennB.]

Usually, White is - (negative) and Black is + (positive) But, you could have different colors in a 77. I had a 72 Holiday and can be sure about the white but don't really remember the positive color.
Glenn

[Shellback1]

The Red is positive and the Black is ground.

[Paul R. Haller]

Uhh don't count on colors to guide you. I have a BMW where the negative battery cable is RED and an RV with a white battery negative. All that said the negative battery cable, if you follow it back from the battery terminal, should connect to the frame. The positive generally goes to an automotive circuit breaker and from there onto the fuse panel. If you can't see where they go get out your VOM and with the battery not connected and not plugged in put your meter on Ohms and check between the fuse panel and one ogf the terminals at the battery. The one with the lowest resistance (near 0) should be positive. Now, label your cables.

P.S. In household AC wiring white is always neutral and any color besides green is hot but generally red or black. Green in Household AC is always ground. I label my wires Red for positive and green for ground in my trailer. You can buy colored electrical tape at any hardware store. Wrap the tape up red about 2 feet on all your positve wires or you can simply label them.
-PaulR. Haller

[frankdamp]

The terminals themselves should tell you. They are different diameters. Whichever terminal fits the battery post is the right one. If you have separate small-wire add-ond, you're on your own!

[Ray,IN]

A simple continuity checker used on the wires and to the Chassis ground or DC ground bus in the converter should identify ground wire.(use a length of bulk wire to reach the converter). Same thing will apply to using the convetrers DC fuses to the battery (pos)