I just removed the battery from my 69 16SC. The "cables" were not hooked up. There are 2- black wires, and 1- white wire...these are about the same size as the connector to the tow vehicle. They are just hanging. I'm guessing these would be the "battery cables" The battery has lugs with wing nuts to attach the "cables". Do the 2 white wires connect to the (+), and the black one to the (-) ? Thanks for any info. Jim
Post by hastashasta on Jan 7, 2011 18:54:36 GMT -5
I know this is an old thread, but curious how it turned out. I would normally assume that in a DC circuit, the black would be - and the white would be + as guessed in the post above. But when I tried that in a Layton trailer that I recently acquired, the polarity was reversed. To be sure which is which, try measuring the resistance (with an Ohm meter) between each wire and the trailer or tow vehicle chassis. One should have very low resistance while the other will have either an open or simply higher resistance (depending on light/appliance switch postions).
Newer trailers use White for ground wires. It's hard to guess what color would be which after many years and owners' changes. I usually rewire with 8 or 10 gauge from the battery and into the trailer. Takes away the mystery of it. I use White for ground and either black or red for hot.