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Thread: New alternator, still not enough voltage

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  1. #1
    Join Date
    Aug 2006
    Location
    Boulder, CO, USA
    Posts
    195

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    Yes had to swap old pulley on there. Here's what i don't get though, i have tried 2 supposedly good v-regulators and this new alternator all with the same results. Voltage just drops when loaded. I did try another battery, i got 14v right after starting, but in a few minutes the voltages tanked. Are there any relays that would isolate the load of accessories from the alternator? I guess i don't see how it could put out all the amperage needed but still have such low voltage.

  2. #2
    Join Date
    Apr 2006
    Location
    Chicago, Il. U.S.A.
    Posts
    4,243

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    The voltage regulator is bad, buy a new one
    "The gas pedal wouldn't go to the floor if it weren't meant to be there"

  3. #3
    Join Date
    Aug 2006
    Location
    Boulder, CO, USA
    Posts
    195

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    Ross, i didn't make this clear but i tried that with the original alternator. So i have one voltage regulator that has run all of 20 mins and another that was on the rebuilt alternator. Neither v-reg in either alternator makes any appreciable power nor responds to load. Am i dealing with all bad parts here? Possible, but i find it hard to believe all the new parts i received are bad. Am i looking at a bad ground or something goofy like that?

  4. #4
    Join Date
    Apr 2006
    Location
    Chicago, Il. U.S.A.
    Posts
    4,243

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    If it tested only 13 v on the bench I can only conclude a bad regulator.
    What happens if you disable the new lights you installed??
    "The gas pedal wouldn't go to the floor if it weren't meant to be there"

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