As others have stated always when charging (or Jumping) any vehicle always hook + to +, and - to -. If a vehicle is positive ground or negative ground, that only means how the battery is hooked up to the vehicle. It does not change the polarity of the battery. On many shematics we were taught to believe ground is negative. On vehicles, ground only means the wire leading to the vehicle's frame.
When jumping or charging a battery when you hook negative to positive you will double the voltage of the system and can destroy all the electrical components on that vehicle or both vehicles more so when jumping. When you hook a battery charger up positive to negative you will get lot of arcing and the charger doesn't even have to be plugged in for this to happen.
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Today's Featured Article - History of the Nuffield Tractor: Conclusion - by Anthony West. In the last piece I mentioned that Nuffield had reached the stage where they had chosen to drop the "Universal" from production. The two new models were given three figure numbers, instead of "three" and "four". Model numbers were introduced to help farmers and dealers instantly recognize the engine size and horsepower of the tractor, the 4/60 had a four cylinder diesel engine which developed 60 bhp at 2,000 rpm. The 3/42 had a 3 cylinder diesel engine which produced 42 bhp at 2,000 rpm. Th
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