15 Prostar electrical fault

Discussion in 'International Forum' started by Ken C, May 24, 2022.

  1. Ken C

    Ken C Bobtail Member

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    May 24, 2022
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    4 batteries had bad smell. Replaced 2 and went otr but smell returned. I disconnected the 2 bad batts because they were draining the new ones. I ran about a week and when I returned home I decided to replace the other 2.
    I installed and truck drove with zero issue. Came back next morning to an ELECTRICAL FAULT... No codes. But won't turn over. Just continuous beeping.
    Disconnected all batteries for several hours. Reconnected and still shows Electical Fault and beeping
    I'm lost. All connections are clean and secured.
     
    Last edited: May 24, 2022
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  3. Heavyd

    Heavyd Road Train Member

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    Eaton automatic transmission?
     
  4. Ken C

    Ken C Bobtail Member

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    May 24, 2022
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    Yes
     
  5. Heavyd

    Heavyd Road Train Member

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    The transmission controller will actually allow the engine to crank. If the transmission controller is not booting up this will cause your issues. Low voltage cranking/bad batteries and boosting can take out an Eaton transmission controller. Your next step is to have it towed to a shop that can plug into it and see what the codes are and if the transmission is communicating on the datalink or not and go from there. If the transmission is missing then power, ground, ignition inputs and datalink activity to the trans controller need to be tested.
     
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  6. 2013Maxx

    2013Maxx Light Load Member

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    Check the 10amp breaker for the transmission on the passenger side panel. I pulled my transmission breaker out and turned the key to “on” just to see what it’ll do and it went haywire with electrical fault beeping and all. I hurried up and put it back lol.
     
  7. Ken C

    Ken C Bobtail Member

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    Ok we got the TCM replaced and now the truck starts. However it won't go into gear and data doesn't show the engine. Only the Trans. Thinking the tcm needs programming? Is the truck being deleted an issue because of the changes that were made?
     
  8. Heavyd

    Heavyd Road Train Member

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    The ECM should still be showing up on the datalink. How did you order the TCM? It will need to be configured for the trans and engine it is attached to.
     
  9. Ken C

    Ken C Bobtail Member

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    I purchased at the intl dealer. Rush here in Atlanta. Do they come already configured? Or is there a programming in service ranger?
     
  10. Heavyd

    Heavyd Road Train Member

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    I'll have to ask tomorrow how that works. I can't remember exactly right now, I'm getting old, LOL!
     
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  11. 2013Maxx

    2013Maxx Light Load Member

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    Did you go from inside the truck to replace the TCM? Looks like a tight fit from underneath.
     
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