Operation CHARM: Car repair manuals for everyone.

Alternator

Test Output & Field Current Draw
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Rated Output Test Output Field Current Draw
55, 56, 63, 66, 70, 78, 85 -
Note: Increase engine speed until maximum alternator output is obtained (approximately 2000 rpm), output must be within 10 amps of rated output
4-5 at 12
97, 100, 108, 120 -
Note: A Run engine at moderate speed, output must be within 15 amps of rated output
4-5 at 12