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Peterbilt 387 warning lights

Discussion in 'Peterbilt Forum' started by BADTrucker, Jun 26, 2012.

  1. Jun 26, 2012 #1
    BADTrucker

    BADTrucker Bobtail Member

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    Jun 22, 2012
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    Had a 2005 PB 387 in yesterday with a complaint of trans & frt drive axle overheating. Driver wanted gear oil changed. He showed me what the gages were doing and there were small red diodes blinking intermittently like wig-wags on a cop car. Further questioning of the driver also revealed that the gages spiked to high temp then dropped & quit working within the last 24 hrs prior to coming into our shop. A visual inspection of the gearcases turned up a broken-off trans temp sender & a disconnected frt drive axle temp sender. Gearbox level check & oil condition showed low oil in both trans & frt drive axles & that the oil was in definite need of draining & replacing. Installed new sender on trans, reconnected sender on frt drive axle, changed oil in all 3 gearboxes, & problem solved. I contacted my local pete delaership regarding the wig-wagging diodes and was advised that it could be a bad interface module. Any idea where this module is and how mch of a PITA is it to change out? I am asking this for future reference & training of my fellow techs here at my shop in case it happens again.
     
    BADTrucker, Jun 26, 2012
    BADTrucker, Jun 26, 2012
    #1
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  3. Jun 28, 2012 #2
    JackZ

    JackZ Bobtail Member

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    6
    Jul 7, 2011
    Winston-Salem, NC
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    BAD:

    On my 2006 387, I think the gauge interface module is under the dash against the interior firewall somewhere behind the radio and I'm guessing that yours is around there as well. I have also attached a link below to an eBay ad that has a picture of one in case you don't know exactly what you're looking for.

    Also, the gauge system in my truck was made by Ametek Dixson (yours probably was also) and on their web site they have a trouble shooting manual available and I have also included a link to that below.

    I hope this helps.


    http://www.ebay.com/itm/04-05-06-Peterbilt-387-Interface-Module-Box-Q27-6001-00322-05421AA-/320919616554?

    http://new.ametek.com/content-manager/files/DIX/387 service manual 40245D.pdf
     
    JackZ, Jun 28, 2012
    JackZ, Jun 28, 2012
    #2
    QUALITYTRUCK Thanks this.
  4. Jul 2, 2012 #3
    lee714

    lee714 Bobtail Member

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    Jul 2, 2012
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    I'm not sure where it is in a 387 but in a 379 it is inside the center of dash below the music radio. Black box about a foot long ,six or eight inches wide two inches thick. You could probably buy hand tools to help change out that interface module. I think I got mine from terminalsandconnectors.com. Hope that helps.
     
    lee714, Jul 2, 2012
    lee714, Jul 2, 2012
    #3
  5. Aug 4, 2012 #4
    PETEDEALER

    PETEDEALER Bobtail Member

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    Aug 4, 2012
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    Interface module is on the inside of the left frame rail just behind the transmission.
     
    PETEDEALER, Aug 4, 2012
    PETEDEALER, Aug 4, 2012
    #4
  6. Aug 11, 2021 #6
    Jianez6280

    Jianez6280 Bobtail Member

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    Aug 11, 2021
    0
    I have a 03 peterbilt 387 and have a yellow solid light any help please
     
    Jianez6280, Aug 11, 2021
    Jianez6280, Aug 11, 2021
    #6
  7. Aug 11, 2021 #6
    Jianez6280

    Jianez6280 Bobtail Member

    4
    0
    Aug 11, 2021
    0
    This is the light that showing
     

    Attached Files:

    Jianez6280, Aug 11, 2021
    Jianez6280, Aug 11, 2021
    #6
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