Pcm bad?

Discussion in 'General Discussion' started by i_burn_diesel, Feb 7, 2014.

  1. i_burn_diesel

    i_burn_diesel Junior Member

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    Hey guys I'm new to this forum, just recently traded my 2003 Chevy Silverado 2500HD 6.0 for a 1998 12v Dodge 5.9 Cummins Dually. I had problems in my Chevrolet (go figure) with the instrument panel going bad instrument motors not working. When I picked up this new truck I noticed none of the instrument panel worked at all, either. Speedometer, tachometer, fuel gauge, oil gauge, ect don't move at all. All of these warning lights are lit up on the dash, though. The alternator is fine but will not charge the batteries and I have tested the alternator to make sure it is fine and it is. So I set up an external regulator to charge the batteries and I've been looking around some forums and such but cannot get a definitive answer on whether it is the PCM or not. Thanks for any input on the matter.

    -Logan


    -Logan P
    1998 5.9 12v long bed cummins
    "farm truck"
    Been shootin sh** since '96
    i'm a Copenhagen cowboy
    Born n' raised Southern IN
     
  2. i_burn_diesel

    i_burn_diesel Junior Member

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    Any ideas


    -Logan P
    1998 5.9 Dodge Ram 3500
    "farm truck"
    Born n' raised Southern IN
     
  3. rustydagger

    rustydagger Senior Member

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    From what I understand on those trucks the voltage regulator is part of the pcm and in 90+% of cases if the alternator and batteries are for sure good it is the pcm.
    Unless some wires are melted or chewed somewhere.

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  4. rustydagger

    rustydagger Senior Member

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    Have you taken it anywhere and had them read the obd codes?
    Is the wiring tampered with much? There are several systems that people can and do bypass instead of replacing parts.

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  5. Redtruck-VA

    Redtruck-VA Senior Member

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  6. Merc225hp

    Merc225hp Senior Member

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    Not my best area for these trucks but there is a fuse for all of that, no bus should be a code and I think the fuse is called oid or ord or oid ???? I will see if I can find it and post back.
     
  7. i_burn_diesel

    i_burn_diesel Junior Member

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    Redtruck-VA I already have an external regulator installed and the batteries charge.


    -Logan P
    1998 5.9 Dodge Ram 3500
    "farm truck"
    Born n' raised Southern IN
     
  8. i_burn_diesel

    i_burn_diesel Junior Member

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    Ram Year:
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    I don't believe the wiring has been tampered with he told me he took it to dodge dealership and they said it was the pcm but I just wanted to double check before I shell out $400 to get a new pcm and it flashed


    -Logan P
    1998 5.9 Dodge Ram 3500
    "farm truck"
    Born n' raised Southern IN
     
  9. i_burn_diesel

    i_burn_diesel Junior Member

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    Okay merc get back at me, I appreciate all the replies guys. Thanks for all the input loving the new #dodge pickup


    -Logan P
    1998 5.9 Dodge Ram 3500
    "farm truck"
    Born n' raised Southern IN
     
  10. rustydagger

    rustydagger Senior Member

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    What are your plans for this truck? It would be a good time to switch to a performance computer system or something like that lol

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