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dondon 4/13/2012
1998 Mercedes Benz C43 AMG Base 8Cyl4.3L - Preventive Maintenance
batterey light on dash,battery charged & alternator both tested ok at local auto zone&adavance auto parts,
142000 miles,battery discharged afer starting & running motor for about 15 minutes,all fuses ok removed & cleaned chassy to engine ground cable
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  • Bill
    Bill 4/13/2012
    Does battery die after 15 min or does engine die. If engine dies a bad alternator, 95%
    dondon 4/14/2012
    this time ,battery & engine ,yesterday i had just over 13 volts at batterry& just over 13 volts at alternator,& juat over 13 volts at the smaller wire on the back of the alternator,& when i reconnected it to the alternator the voltage drops,i have heard that an internally shorted alternator cant be detected with the tester these auto parts store uses

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