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Thread: 5.7 Hemi pin-out

  1. #21
    Advanced Tuner
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    Mar 2018
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    Illinois
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    Quote Originally Posted by spoolboy View Post
    Thanks for the 2nd link. Very handy!
    The engine hardware workbook (see 3rd post in thread below) has some info not seen in the service manual.
    https://www.challengertalk.com/forum...kbooks-667301/

  2. #22
    Advanced Tuner
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    Mar 2018
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    Quote Originally Posted by Engineer@HPT View Post
    Yes, you need 34 and 35. 34 connects to OBD2 pin 6 and 35 connects to 14.

    For shop manuals, you can use http://www.techauthority.com. It's not free but you can get a short term subscription and print out everything you need.
    FYI - There is a library in New Mexico that allows public access to chiltons:
    https://roswell-nm.gov/1112/Chilton-Auto-Repair-Library

  3. #23
    Advanced Tuner
    Join Date
    Jun 2010
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    293
    Quote Originally Posted by TOOKUWL View Post
    Hello all new to hp forums.... I am trying to build a bench harness myself and am having an issue with the Ignition cycle as its not seeing me switch ignition off for 3 seconds anyone able to help I followed the diagrams form the link above
    i have the same problem, did you fix it?

  4. #24
    Potential Tuner
    Join Date
    Sep 2023
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    1

    Arrow same issue

    Quote Originally Posted by TOOKUWL View Post
    Hello all new to hp forums.... I am trying to build a bench harness myself and am having an issue with the Ignition cycle as its not seeing me switch ignition off for 3 seconds anyone able to help I followed the diagrams form the link above
    iam having the same issue. 2005 300c ecm won't detect the key cycle for some reason. harness works for flash other years and models but won't detect key cycle on this one. I know on the ford stuff when you cycle the key it sends 18v to some wire supposedly but when I bench flash most my ford stuff I just unplug the ecm plug and plug it back in quick and it works every time as a key cycle. however on this one it won't trick it into working. Does anyone know what wire the hp tuner sends 18volts down turning the key off? that way I can just simulate it with a 18v power supply.