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Message: <blockquote data-quote="QtrHorse" data-source="post: 1745374" data-attributes="member: 567206">They will put a load on the alternator, to see if it is putting out the stated amperage. If it's a 200 amp alternator, it should put out 200-210 amp at a full load. A good result would be for you alternator to be putting out 200 amps and a bad result would be for your alternator to put out 150 amps if it's rated at 200 amps. They will also be able to tell you exactly what voltage it is putting out at idle. They should also be able to test your batteries under as well.If all your tests were done at idle, then that is your problem. The alternator will never be able to handle that load at idle, without the problems you stated.</blockquote>

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