Alternator...

Discussion in 'Electrical and Ignition' started by MAPS, Jun 26, 2018.

  1. MAPS

    MAPS Well-Known Member

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    COUPLE OF QUESTIONS.
    WHAT SHOULD THE VOLT METER READ/SHOW AT.....I.E.WHAT'S THE NORM ?
    IM SHOWING 13.7-13.9
    IS THAT OK ? CAUSE AT TIMES IT SEEMS LIKE THE BATTERY DIES AND I NEED A JUMP START AND I'M GOOD FOR A FEW WKS AGAIN...DEPENDING ON HOW MUCH I START AND STOP THE CAR DURING THE DAY AND FREQUENCY BETWEEN THESE TWO ACTIONS.

    ONE MORE QUESTION HOW MANY WORDS SHOULD BE GOING TO OUR FROM THE ALTERNATOR (connections)
    THANKS.
    MAPS
     
  2. RustyRatRod

    RustyRatRod Just another dumbass. FABO Gold Member Technical Editor

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    YEAH THAT'S OK.

    Now, quit hollerin at everybody. lol
     
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    • 67Dart273

      67Dart273 Well-Known Member

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      13.9 is not bad. What year car? If it's 69/ earlier, should be a big thick black (the output) to a stud/ nut and one green "push on" smaller wire which is the field from the regulator

      If it's 70/ later, should have one more (blue) "push on" wire which is ignition "run" 12V from the ignition switch

      Put under what conditions did you measure the 13.9? Check that the V belt is not slipping. Then warm it up and allow the battery to "normalize." Now measure at the battery with engine running to simulate "medium cruise" RPM. Now turn on whatever accessories you can, hazard flashers, heater blower, lights, etc. It should maintain an absolute minimum of 13.5, no lower
       
    • MAPS

      MAPS Well-Known Member

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      lolol, the damn thing is in Caps at times and I don't realize it until I hit "send."
      By thet it's to late....and too little. Albeit, I'm not one that actually does holler at people, let alone those that are either friends or helping me solve my daily qualms. lol
      With that said now, please ....( joking, joking)
      You know that was a stupid sense of trying to create humor, just trying to be funny, In fact I regret saying it, so im just going to delete it.lol
      Gone.
      Thanks for all the help as well.

      Maps
       
    • MAPS

      MAPS Well-Known Member

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      20180625_145143.jpg 20180625_145059.jpg
      As always, anyone that does answer are a book of intellect.
      It's a 69 Barracuda 20180625_145117.jpg 20180625_145035.jpg 20180625_145154.jpg
       
      Last edited: Jun 27, 2018
    • MAPS

      MAPS Well-Known Member

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      Ok I just added a cpl of pics, I took earlier today to send to another helpful member that I was trying to understand from...
      That green wire that I am concerned about that is just laying by the intake, is that supposed to be grounded somewhere ?
      The alternator is a Powermaster (I believe at least 100 amps or so) it's seems to be one of those Serpentine pulleys in the front of it, but the car had no other fancy pulley bracket, all in one etc...
      Now the fact that at times I've had to have the car jump started ...and it works go good for a few weeks has me in a spin. The garage looked at it and it showed 13.7-13.9 V. and they checked the alternator and the shop said it's working fine. I can't figure this out.
      Most importantly, as well remember back in the day, we checked the alternator by removing the battery cable once the car started to run and if it kept running it was ok, if not, you needed an alternator.
      Well the alternator was checked and the shop said it's fine....but when the cable is removed, its "nights out in Moparville"
      Any help, ideas will truly be appreciated, any correction will sincerely be rejuvenating...to my well being, lol
      Regardless, if someone can tell me where that wire (green) goes, I'd love to know and if it will help with my "suspicious" electrical problem.
      Sincerely and still...
      MAPS
       
    • mullinax95

      mullinax95 Well-Known Member

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      How old is the battery? Have you had it checked?
       
    • MAPS

      MAPS Well-Known Member

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      About a yr old the battery is ok, its this green wire id like to know if it needs to be grounded or connected somewhere.
      Thanks.
      MAPS
       
    • 67Dart273

      67Dart273 Well-Known Member

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      --------OK----------forget what I told you earlier. You EVIDENTLY HAVE an import car and THAT IS NOT the "normal" U.S. alternator setup, rather Bosch or something else. Not familiar with the wiring on those from what I can see there........

      THAT MAY BE a Delco "one wire" swap which no longer needs an external regulator. DO NOT ground the green. It may be still connected to the regulator. Show us the firewall area or try and locate the regulator

      Also IF this is a "one wire" that could explain the somewhat low reading.......this is because a "one wire" alternator SENSES the charging voltage right at the alternator output terminal. This means that voltage drop in the harness (on the path to the battery) will cause the battery to run a bit low
       
    • famous bob

      famous bob mopar misfit

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      He aint hollerin at anybody, probly cant keep from HITTING THE WRONG KEY! LOL
       
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      • MAPS

        MAPS Well-Known Member

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        Thank you.not hollering.
        Its a powermaster alternator..

        Its a Jegs sold type for Chryslers...
         
      • MAPS

        MAPS Well-Known Member

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        Can someone please tell me what do I do with the "Green" wire now, do I just keep it open like that or do I look to ground it ?
        Please, any help will be appreciated it as I seem to have a charging issue, the car starts and goes but at times if I try to start it too many times it dies out, but will always start if I just drive it for the day, park it and go back the next morning to leave with it again....its just that if I keep starting. shutting it off in a short period of time it seems to make the battery slow down and drained.
        The strange part is the alternator was checked and it works fine ? I have about 13.7 volts (volt meter test while the car was running) but if the battery is removed the car dies, go figure. (At least Im trying still lol)
        Thank you.
        MAPS
         
      • 67Dart273

        67Dart273 Well-Known Member

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        No way for me to know. I am GUESSING you have a Delco "one wire" which does not use a field. So leave the green alone. Do NOT ground it as it may still be connected to the original VR

        The charge voltage is a "bit" low. Did you measure running / charging voltage both at the battery AND at the alternator stud? This will show if there is voltage drop. Measure with engine running at RPM to simulate low to medium cruise

        Measure with lights, etc off, and again with lights, heater, whatever loads you have turned on. If there is a "sag" between the two voltages, you have too much drop in the alternator circuit.