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Peterbilt 387 electrical problem help

Discussion in 'Trucks [ Eighteen Wheelers ]' started by speeedy, Aug 25, 2013.

Page 1 of 3
  1. Aug 25, 2013 #1
    speeedy

    speeedy Light Load Member

    150
    25
    Feb 16, 2013
    miami FL
    0
    so I was driving everything was great temperatures were fine all of a sudden I lose all electrical power the only thing that was still working was the four ways. Does anyone have any idea where to check I called my mechanic he says it might be a loose wire but I have no idea where to start looking. I lost power to the dash headlights and engine about a minute later they got power again and it started back up with no problem has this happened to anyone here? Do you have any ideas where to start looking for this issue I have a caterpillar c15. I would appreciate any help or any ideas I checked all the wires on the battery they are tight I check the wires on the fuse box all the pins are in tight anybody else got any ideas?
     
    speeedy, Aug 25, 2013
    speeedy, Aug 25, 2013
    #1
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  3. Aug 25, 2013 #2
    Fatone

    Fatone Bobtail Member

    15
    3
    Jul 11, 2013
    0
    Check where the + battery cables join together on the starter for good connection.Also check where the - cables join together on the engine block or starter.
     
    Fatone, Aug 25, 2013
    Fatone, Aug 25, 2013
    #2
    speeedy Thanks this.
  4. Aug 25, 2013 #3
    ahmadali04

    ahmadali04 Bobtail Member

    28
    6
    Jan 30, 2011
    0
    I had a similar issue on one of my 387's. I turned out to be a broken ground cable connecter under the sleeper of the truck. You may want to check that, if all other grounds are okay.
     
    ahmadali04, Aug 25, 2013
    ahmadali04, Aug 25, 2013
    #3
    speeedy Thanks this.
  5. Aug 26, 2013 #4
    peterbilt_2005

    peterbilt_2005 Medium Rare

    3,906
    29,188
    May 4, 2013
    Commie-fornia come visit we have C. A. R. B
    0
    I agree. Check the starter bolts for any loose cables. Check all grounds. As well as your block of large fuses in the battery box. And your batteries. Start at your sources of power. Also check the wire coming from the alternator/ generator. I have a 387 if you need any help yell.
     
    peterbilt_2005, Aug 26, 2013
    peterbilt_2005, Aug 26, 2013
    #4
    speeedy Thanks this.
  7. Aug 26, 2013 #5
    Blind Driver

    Blind Driver Road Train Member

    3,080
    1,405
    Aug 7, 2006
    New Albany, IN
    0
    Be sure the 3 small connectors at the batteries are connected. One or more of these supplies juice to the ECM.

    In my experiences, it's almost always a bad ground.
     
    Blind Driver, Aug 26, 2013
    Blind Driver, Aug 26, 2013
    #5
    speeedy Thanks this.
  8. Aug 26, 2013 #6
    speeedy

    speeedy Light Load Member

    150
    25
    Feb 16, 2013
    miami FL
    0
    Thanks fellers will report outcome by tommorow night
     
    speeedy, Aug 26, 2013
    speeedy, Aug 26, 2013
    #6
  9. Sep 18, 2013 #7
    speeedy

    speeedy Light Load Member

    150
    25
    Feb 16, 2013
    miami FL
    0
    well I ran hey secondary ground wire from the chassis to the cab haven't had a problem yet thank you guys so much you truly are lifesavers
     
    speeedy, Sep 18, 2013
    speeedy, Sep 18, 2013
    #7
  10. Feb 14, 2014 #8
    peterbilt_2005

    peterbilt_2005 Medium Rare

    3,906
    29,188
    May 4, 2013
    Commie-fornia come visit we have C. A. R. B
    0
    I have found the wire diagram for a 2005 Peterbilt 387. In PDF format. About time.
     
    peterbilt_2005, Feb 14, 2014
    peterbilt_2005, Feb 14, 2014
    #8
  11. Mar 4, 2014 #9
    Dino1968

    Dino1968 Light Load Member

    181
    64
    Sep 22, 2011
    IN MY _ If I tell ya I gotta killya
    0
    That would be a great thing to have !!!!! Any links or something ?
     
    Dino1968, Mar 4, 2014
    Dino1968, Mar 4, 2014
    #9
  12. Mar 4, 2014 #10
    Eustace

    Eustace Bobtail Member

    47
    12
    Jan 28, 2014
    0
    ............ I had a similar problem with a 386 a while back, turned out to be alternator was overcharging and cab controller shut almost everything down in cab, not saying that is the problem but might be something to keep in mind.
     
    Eustace, Mar 4, 2014
    Eustace, Mar 4, 2014
    #10
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