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Dim Charging Light

Discussion in 'Early CJ5 and CJ6 Tech' started by IowaGadget, Nov 21, 2014.

  1. Nov 21, 2014
    IowaGadget

    IowaGadget New Member

    Ankeny, Iowa
    Joined:
    Dec 24, 2012
    Messages:
    18
    Have a '69 with a V6 - daily driver. I have been trying to get the very dim lit charging light to go out. Light is bright prior to turning over the key and battery stays strong - no charging issues.Volt meter reads 14.1 at startup then gradually drops to about 13.5. The charging light stays barley lit all the time and I'm out of guesses. Changed alternator (interior regulator) - changed wires - battery is good.

    Any suggestions besides don't look at the light?
     
  2. Nov 22, 2014
    uncamonkey

    uncamonkey Member

    Greeley CO
    Joined:
    Jun 2, 2009
    Messages:
    2,104
    I think you are right, don't look at the light, It's basicly a resistance circuit that tells the alternator to work. Your voltages are in the correct range. If the light gets bright while you are driving, then you have a problem.
    Battery stays charged, so don't worry about it.
    I did go out and fire up my '61 3B with the V6 conversion, I could barely see the dim glow from the light, even in the dark out there, so, I think it is a don't mess with it situation.
     
    Last edited: Nov 22, 2014
  3. Nov 22, 2014
    nickmil

    nickmil In mothballs.

    Happy Valley, OR
    Joined:
    Sep 23, 2002
    Messages:
    12,530
    Sounds suspiciously like a weak/leaking diode in the rectifier.
     
  4. Nov 22, 2014
    IowaGadget

    IowaGadget New Member

    Ankeny, Iowa
    Joined:
    Dec 24, 2012
    Messages:
    18
    Thank you for the sanity check!
     
  5. Nov 22, 2014
    hewebb

    hewebb New Member

    DFW area Texas
    Joined:
    Dec 22, 2013
    Messages:
    38
    On bright sunny days I could not see the charging light and did not like the oil light. I installed separate gages for both. Also, while installing them I installed a power receptacle. (just in case-not sure why)
     
  6. Nov 22, 2014
    Walt Couch

    Walt Couch sidehill Cordele, Ga. 2024 Sponsor 2023 Sponsor 2022 Sponsor

    cordele, Ga.
    Joined:
    Mar 29, 2007
    Messages:
    5,925
    Many guys replace the light bulb with a standard dash bulb. The resistance of the dash bulb is different from the alt/oil bulbs. Install the proper one and you will be good. Original bulb was TS53.
     
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