You have a bad diode in the alt. If you like to fix things youself you can check it & replace it yourself. Diodes pass current only one way. If you hook an ohm meter or self powered test light to each one you should get continuity one way & reverse the polarity & get no continuity.


They say money can't buy happiness. It can buy old Chevy trucks though. Same thing.
1972 Chevy c10 Cheyenne Super
In the Gallery Forum