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Alternator over charge

Discussion in 'Heavy Duty Diesel Truck Mechanics Forum' started by Wvcoalpacker, Nov 19, 2019.

Page 2 of 2
  1. Nov 20, 2019 #11
    AModelCat

    AModelCat Road Train Member

    29,407
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    Jul 7, 2015
    Canuckistan
    0
    If you didn't already do it I'd put a fuse on that wire you installed. One at the battery and one at the alternator. If the wire rubs through on the frame with no fuse, it'll burn. I don't know what fuse rating to use as I don't know the amp load travelling through that wire.
     
    AModelCat, Nov 20, 2019
    AModelCat, Nov 20, 2019
    #11
    Wvcoalpacker Thanks this.
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  3. Nov 20, 2019 #12
    Wvcoalpacker

    Wvcoalpacker Bobtail Member

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    Dec 22, 2017
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    I guess my old alternator didn't need that remote sensor wire but this new one did. I've run this engine for over a year now and never had any trouble with the charging system then all of a sudden it starts overcharging so I changed the alternator and put it back exactly the way it came off and it helped but still overcharged in wet conditions. I never even thought of adding a RS wire but I did and it seems to be fixed. Thank you!
     
    Wvcoalpacker, Nov 20, 2019
    Wvcoalpacker, Nov 20, 2019
    #12
    KB3MMX Thanks this.
  4. Nov 20, 2019 #13
    Wvcoalpacker

    Wvcoalpacker Bobtail Member

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    Dec 22, 2017
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    Yes I'll do That right now
     
    Wvcoalpacker, Nov 20, 2019
    Wvcoalpacker, Nov 20, 2019
    #13
  5. Aug 9, 2020 #14
    Zanahoria47

    Zanahoria47 Bobtail Member

    2
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    Aug 9, 2020
    0
    I have the same problem.. international prostar 2015.. I came to ta..replaced one battery. Checked the alternator. They said the alternator is good. After one hour the gauge is going to 15.5.
     
    Zanahoria47, Aug 9, 2020
    Zanahoria47, Aug 9, 2020
    #14
  7. Aug 9, 2020 #15
    Zanahoria47

    Zanahoria47 Bobtail Member

    2
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    Aug 9, 2020
    0
    Help. Is possible the alternator is bad? Even if the technician in the TA says is good?
     
    Zanahoria47, Aug 9, 2020
    Zanahoria47, Aug 9, 2020
    #15
  8. Sep 19, 2020 #16
    Lockport

    Lockport Light Load Member

    197
    125
    Mar 26, 2011
    Lockport, MB, CAN
    0
    Remote sense should be a 5A fuse. Under 10' 16 gauge is acceptable but over 10' 14 gauge should be used. This will resolve the alternator overcharging and is critical if you are running expensive deep cycle and AGM batteries. AGM batteries will quickly reach the end of their life if charged much over 14V routinely.
     
    Lockport, Sep 19, 2020
    Lockport, Sep 19, 2020
    #16
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