alternator not charging battery

Discussion in 'New Members Forum' started by devrin010, Jan 12, 2014.

  1. devrin010

    devrin010 Member

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    I have a new battery alternator and voltage regulator but no charge I don't know what to do please help
     
  2. 71gold

    71gold Frank Cooper Supporting Member

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  3. mojo

    mojo "Everett"- Senior Citizen Supporting Member

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    Are we talking new or rebuilt alternator? You cud have a defective part. Have u sused a voltmeter and tested the output at the battery?
     
  4. mav1970

    mav1970 Bob Hatcher

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  5. Krazy Comet

    Krazy Comet Tom

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    I'd look for wiring issues often problems in old wiring at plugs, terminals etc...

    If the fuse link mentioned was bad, vehicle would be totally dead...
     
  6. rthomas771

    rthomas771 Member

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    I seen where some electronic regulators won't get excited until the engine is rev up to 2500-3000 rpm. After that...they will charge all day long until you shut off the engine.
     
  7. Mercurycruizers

    Mercurycruizers David (Coop) Cooper

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  8. mercgt73

    mercgt73 Member

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    The black/orange alternator charging wire is a fusible link. The yellow ignition wire is also a fusible link.
     
  9. MSmithPDX

    MSmithPDX Member

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    You can also not charge if you have a bad ignition switch. The car will start and when it returns to run the switch fails, the car continues to run but the circuit for the charge system is broken.
     
  10. Krazy Comet

    Krazy Comet Tom

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    True, thanks for straightening me out...

    Yes there is a fuse link connecting the alt to battery, if open battery will not receive charge...
     
  11. devrin010

    devrin010 Member

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    black and orange alternator wire

    how many amps in the black and orange alternator wire
     
  12. mercgt73

    mercgt73 Member

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  13. devrin010

    devrin010 Member

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    How do i test the voltage regulator?
     
  14. devrin010

    devrin010 Member

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    how do you test the switch?
     
  15. Krazy Comet

    Krazy Comet Tom

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    I wouldn't even attempt to check the voltage regulator(and I've been working on this stuff almost 50 years), if it's old just replace it...

    As far as the switch, it's possible but if the car starts and runs OK otherwise chances are slim it's bad... You'd need a wiring diagram and then check with a ohm meter to be sure terminals are making contact in the various positions, almost as complicated as checking the regulator...

    Did you check the fuse link as suggested??? It's the most likely cause by a wide margin...
     

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