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Low voltage

Discussion in 'Trucks [ Eighteen Wheelers ]' started by Cagedmonkey, Jan 2, 2017.

Page 2 of 2
  1. Jan 2, 2017 #11
    Cagedmonkey

    Cagedmonkey Bobtail Member

    9
    6
    Oct 31, 2016
    Oklahoma
    0
    okay y'all thanks for all your very helpful info. The display locks up when the voltage goes below 10.5 FYI I have shut off everything including dashboard lights on phone chargers everything I could in the cab I shut it off. Not sure where my voltage sense since I can't look at the display but I made it to the shop so thank you for all your help
     
    Cagedmonkey, Jan 2, 2017
    Cagedmonkey, Jan 2, 2017
    #11
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  3. Jan 3, 2017 #12
    Cagedmonkey

    Cagedmonkey Bobtail Member

    9
    6
    Oct 31, 2016
    Oklahoma
    0
    Well the 5 amp fuse was blown so upon replacing it it immediately blew again. So now we are in the process of hunting for a grounded out wire. We just put brand new batteries in the truck and it's only putting out 12.2 volts btw
     
    Cagedmonkey, Jan 3, 2017
    Cagedmonkey, Jan 3, 2017
    #12
    uncleal13 Thanks this.
  4. Jan 3, 2017 #13
    Cagedmonkey

    Cagedmonkey Bobtail Member

    9
    6
    Oct 31, 2016
    Oklahoma
    0
    okay it ended up being a bad alternator! But I got new batteries, and another new alternator. Regardless thanks to all of you for your knowledge.
     
    Cagedmonkey, Jan 3, 2017
    Cagedmonkey, Jan 3, 2017
    #13
    BoxCarKidd, SAR and uncleal13 Thank this.
  5. Sep 26, 2017 #14
    MARTIN76

    MARTIN76 Bobtail Member

    9
    1
    Sep 26, 2017
    0
    Have 2004 Volvo vnl
    When ac's on voltage drops from 13.9 to 13.2,3,4
    Alternator fine,new starter,new batteries...
    Any idea?
    3 mech said leave it
     
    MARTIN76, Sep 26, 2017
    MARTIN76, Sep 26, 2017
    #14
  7. Sep 27, 2017 #15
    uncleal13

    uncleal13 Road Train Member

    3,797
    6,299
    Apr 9, 2009
    Humboldt, Sk
    0
    When my a/c is on my voltage goes from 14.0 down to 13.9 volts.
    However when I first got my truck it operated at 14.5 volts and would drop almost a full volt. On my Cascadia there is a fuse called "remote sense" for the alternator. I found it was blown, after I replaced it I now get the more stable voltages.
    I don't know if your Volvo has that fuse.
     
    uncleal13, Sep 27, 2017
    uncleal13, Sep 27, 2017
    #15
    MARTIN76 Thanks this.
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