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  1. How to Test an Automotive Alternator - 2CarPros

    Mar 13, 2022 · How to Test an Alternator The alternator in your car is designed to generate voltage at prescribed amperage which is designated by a voltage regulator or vehicle …

  2. Parasitic drain caused by alternator diodes - 2CarPros

    Because the diodes are shared between the phases, one defective diode causes a loss of 2/3 of the alternator's maximum current capacity. During a professional full-load output test, all you'd …

  3. What Could Cause An Alternator to Test Bad on the Car but

    On vehicle test has to be done 2 ways. One at the battery and the other at the alternator. If the alternator is charging but not getting to the battery, it means a break in the wiring circuuit …

  4. How to Bypass Gm Computer Controlled Alternator - 2CarPros

    A failed diode is also real common, but those are rarely intermittent. Once one fails, all you will be able to get during a full-load output current test is exactly one third of the unit's rated current. …

  5. Alternator Charging Problems?: Alternator Is Only Putting Out 12.5...

    Aug 10, 2020 · Alternator is only putting out 12.5 v under load at idle, if I install a high output alternator will that take care of my problem, battery keeps draining in about a week after …

  6. Varying Alternator Test Results - 2CarPros

    With the misguided test of removing a battery cable on an older car, the engine would keep on running, even though the generator is defective. The proper way to test the charging system is …

  7. Alternator Charging System: My Van Would Not Start Yesterday,

    My van would not start yesterday, after running two days earlier. The battery seemed low. I took the battery out, ant it tested OK. I took the alternator out, and it tested as a bad diode. I …

  8. Altnator not chargeing bit checked ok. - 2CarPros

    What we need to do is to perform a "full-field" test to bypass the voltage regulator. That involves grounding the dark green wire between the alternator and the voltage regulator in the Engine …

  9. Alternator Not Charging?: I Have a 2009 Dodge Ram and It

    I bypassed the PCM with adjustable external voltage regulator. New alternator and new battery. I have 12v to the alternator but alternator still wont charge. I had a broken engine ground strap …

  10. Fusible Link: the Fusible Link Between the Alternator and

    Mar 15, 2015 · An alternator is physically incapable of being forced to generate more than its design current rating. One failed diode will cut that to exactly one third. One of the common …