Recent content by Kai Nordberg

  1. K

    Electronics designing for 1970s automotive OBD

    Okay, I admit the meaning of an analyzer got lost in translation. So we´re trying to make an analyzer, not a sophisticated OBD computer of today. I do know what dwell is but not too familiar with measuring it as Chrysler dropped points distributor in 1972 on selected models. I hope my own...
  2. K

    Electronics designing for 1970s automotive OBD

    The only proof of the original computer can be found on digital newspaper archives. Google "Chrysler Electronic Engine Performance Analyzer" to see just some brief- views of the system. Those three blank connectors were used as a spare for future expansions as I mentioned above, such as AC and...
  3. K

    Electronics designing for 1970s automotive OBD

    Wow, thanks a lot Jim! It all seems to have gotten into history as Chrysler or Huntsville electronics division didn´t patent their invention, at least I can´t found it on US patent office web site. What I do know is that they planned to make add-on to the analyzer that could test and report body...
  4. K

    Electronics designing for 1970s automotive OBD

    Do the schematics show with new link? http://s612.photobucket.com/user/Kaitsu93/library/ The reason I´m undertaking this is because I am a Volvo mechanic and work with old Chrysler cars as a side job. I saw that those cars have a port for testing engine components and run basic tests. I thought...
  5. K

    Electronics designing for 1970s automotive OBD

    Good morning to all! I tried to discuss about the matter on a vintage Chrysler forums, but even with the schematics as evidence for the analyzer existence, all the members said there never was an OBD plug-in on cars of the era. Even with OBD programmers forums, they are more about coding and...
  6. K

    Electronics designing for 1970s automotive OBD

    I uploaded the wiring schematics on my photobucket links to make my conversation more convenient to understand. Here´s the link http://i612.photobucket.com/albums/tt203/Kaitsu93/Chrysler diagnostiikka johdotus vas sivu_zpsbqgjnrlg.png Here we can see the problem with multiple signals that need...
  7. K

    Electronics designing for 1970s automotive OBD

    Thank you for replying. I do know that the wire that is spliced to the OBD wire is after the shunt of the vehicle´s own ammeter. My step dad pointed out using a microprocessor in the P.C board that converts the signals into digital form and therefore, more convenient for him to program into. I´m...
  8. K

    Electronics designing for 1970s automotive OBD

    Hi to all! I´m Kai from Finland and me and my step dad are working to make an OBD system for 1970´s Chrysler vehicles. The company itself made one during the era and we would like to have same kind of system, only with 2010 equipment. (so no fridge- size computer for my shop) We´ve solved most...
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