Disconnecting the battery cable while running it not a good way to check an alternator. Doing so will damage the alternator and if you where to get in line with the cable you take off and ground it can KILL you. Disconnecting it like that makes the VR got to max charge and max volts so it is putting out 35 plus amp which is 35 million time the amps it take to kill and max volts can be 90 plus which is more then enough to push the amp to kill you. Just plain and simple a stupid way to do it.
Correct way to check is a volt meter check and a magnet test. Battery volts should read 12.5 plus not running and 13015 volts running. Magnet test is simple also the back of the alternator center should be magnetic when running if not then it is not being excited as need to work
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Today's Featured Article - A Lifetime of David Brown Tractors - by Samuel Kennedy. I was born in 1950 and reared on my family�s 100 acre farm. It was a fairly typical Northern Ireland farm where the main enterprise was dairying but some pigs, poultry and sheep were also kept. Potatoes were grown for sale and oats were grown to be used for cattle and horse feeding. Up to about 1958 the dairy cows were fed hay with some turnips and after that grass silage was the main winter feed. That same year was the last in which flax was grown on the farm. Flax provided the fibre which w
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