1997 pete 379 battery draw

Discussion in 'Peterbilt Forum' started by flyin hawaiian, Apr 29, 2011.

  1. flyin hawaiian

    flyin hawaiian Bobtail Member

    15
    0
    Apr 28, 2011
    kms96792@gmail.com
    0
    They are new batteries. They truck was dead on a construction site, and I put new ones in so I could get it to our shop.
     
  2. Truckers Report Jobs

    Trucking Jobs in 30 seconds

    Every month 400 people find a job with the help of TruckersReport.

  3. swaan

    swaan Road Train Member

    2,942
    4,374
    Jul 12, 2009
    BC canada
    0
    Allright , well rules that out then.
     
  4. freightlinerman

    freightlinerman Road Train Member

    1,287
    536
    Mar 4, 2011
    Florida
    0
    Disconnect the starter and alternator, one at a time. It's possible the starter could be shorted out inside. I know at a starter shop, I believe they put a positive on the positive end of the starter then tapped the body of the starter with the ground and if it sparked it was bad. I don't recall for certain, but if you had wires rubbing together you'd probably have melting wires or burning wires, worse a fire.
     
  5. flyin hawaiian

    flyin hawaiian Bobtail Member

    15
    0
    Apr 28, 2011
    kms96792@gmail.com
    0
    Thanks for all your help. I have the alternator disconnected now, and the draw is still present. I'll try the starter next.
     
  6. Hardlyevr

    Hardlyevr Road Train Member

    3,270
    2,538
    Jul 30, 2009
    Mapleton Depot,PA
    0
    you could also have a dead short in an ECM.
     
  7. Heavyd

    Heavyd Road Train Member

    7,752
    6,185
    Feb 4, 2009
    0
    Petes have fuses hidden inside the dash too. Does this unit have an a/c inverter, fridge or apu?
     
  8. Heavyd

    Heavyd Road Train Member

    7,752
    6,185
    Feb 4, 2009
    0
    I have also seen water leak into the dash through the wiper pivots and corrode relay and fuse sockets. Pull the dash panels out to have a look.
     
  9. flyin hawaiian

    flyin hawaiian Bobtail Member

    15
    0
    Apr 28, 2011
    kms96792@gmail.com
    0
    It just rained last night, and I noticed water inside on the carpet on drivers side. I removed the positive cables off the starter and bolted them all together, and the draw still remains...
     
  10. flyin hawaiian

    flyin hawaiian Bobtail Member

    15
    0
    Apr 28, 2011
    kms96792@gmail.com
    0
    Would a dead short in the ECM have a draw this size ? Also the truck runs like a top.
    Could a short in the ECM not affect the performance of the engine ?
     
  11. DL550CAT

    DL550CAT Road Train Member

    1,427
    1,482
    Oct 18, 2009
    Waynesburg, Pa
    0
    26 amp draw not likely. It has to be a large wire if it were a small guage wire it would be smoking. You need to find that big of a draw its a fire hazzard!!!!
    Try using the amp clamp on 1 wire at a time to see if you can locate which circut has the draw.
     
  • Truckers Report Jobs

    Trucking Jobs in 30 seconds

    Every month 400 people find a job with the help of TruckersReport.