5EK to 2WS

Discussion in 'Heavy Duty Diesel Truck Mechanics Forum' started by rydr, May 29, 2020.

  1. Superhauler

    Superhauler TEACHER OF MEN

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    If your going to use the 40 pin. Then yes you want a harness from truck 70 pin to ecm 40 pin.
     
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  3. rydr

    rydr Light Load Member

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    Kustom truck quoted me 3600$ for the cab engine harness with a processor module. Do I really need a completely new harness, why would the 70pin to 40pin adapter not work?
     
  4. Superhauler

    Superhauler TEACHER OF MEN

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    Thats what I'm talking about.
     
  5. pushbroom

    pushbroom Road Train Member

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    You need the processor module as the Pete gauges are datalinked and the 40 pin ecms do not support it. 70 pin ecms will talk to the cab and all the gauges will work fine without the module.
     
    spsauerland and 062 Thank this.
  6. rydr

    rydr Light Load Member

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    They make 2 different harnesses

    1 - 3600$ completely new harness with processor module, from firewall to ecm 40 pin.

    2 - 70 pin to 40 pin adapter for 750$ just plug into the existing truck engine harness, but over the phone he told me the ecm would not communicate with the newer cab electronics.

    Is he trying to oversell me or is this actually needed? If I have to buy the 3600$ harness its not an issue just wondering why an adapter wouldnt work
     
  7. rydr

    rydr Light Load Member

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    That makes sense, im guessing the module helps the 40pin ecm communicate with cab side electronics
     
  8. Superhauler

    Superhauler TEACHER OF MEN

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    Thats above my pay grade. Didn't realize you had the deal where one wire controls all gauges...correct ?
     
  9. rydr

    rydr Light Load Member

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    yes 06+ peterbilt guages are multiplex they just plug into one another and run off of a cecu
     
  10. Superhauler

    Superhauler TEACHER OF MEN

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    This ^^^^^ ...that's why I recommended you use the 2ws engine instead of the 5ek.
     
    pushbroom Thanks this.
  11. rydr

    rydr Light Load Member

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    If i had a 2ws i totally would. i was hoping i could convert 5ek to 2ws easily but it will cost as much as the new harness anyways
     
    Superhauler Thanks this.
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