You ALWAYS charge a battery with POS from charger to POS on Battery and NEG from charger to NEG on battery REGARDLESS. Think about it, the battery or charger dont care that one of the battery terminals happens to be bonded to some huge hunk of old iron..........SAFETY NOTE its safer to make the last connection AWAY FROM the battery top where explosive gases may be present. IE If the tractor is Pos ground you could use the tractors iron frame as a substitute for the batterys POS post or vice versa for Neg ground.
Similar, if you use jumper cables its still POS to POS and NEG to NEG. If the tractor is Pos ground and the truck is Neg ground and youre jumping DONT LET THE TRUCK FRAME/BUMPER CONTACT THE TRACTOR
Also a tractor genny can charge at EITHER Pos or Neg ground once properly polarized.
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Today's Featured Article - The Great Escape - by Dave Hollrah. It all began Monday with a little baling of second crop on the lake shore field, and as I drove out past my sister and her hubby's place, this small calling sound could be heard from the general direction of their manure pile. Out of the yard, over the cows and bale piles, through the dozer piles, poplars, and brush, out onto the ditch grade road, past the noisy 6.2 diesel engine pulling my well traveled Suburban along. Well it sure didn't take me long to figure out what it was because I alrea
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