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Overcharged Battery
- Connect voltmeter from alternator No. 2 terminal to ground. If reading is zero, No. 2 lead circuit is open. If check is good and overcharge condition still present, proceed to step 2)
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- Separate end frames and connect ohmmeter, using lowest range scale, from brush lead clip to end frame and then reverse connections. If both readings are zero, either brush lead clip is grounded or regulator is defective. Grounded brush lead clip can result from omission of insulating washer, or insulating sleeve over screw, or damaged sleeve. Remove screw to inspect sleeve, replace regulator if insulating components are satisfactory.
Courtesy of GENERAL MOTORS COMPANY