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  1. #1
    Electronic Ignition!
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    Electrical Schematic for ECM 1227747

    Hello all,

    I have been away for a while and can't seem to find my previous posts.
    Maybe someone can tell me how to find them.
    I am looking for an electrical pinout for ECM 1227747.
    Any help would be greatly appreciated.
    Also, I am trying to reset my password. I entered the forum using the password sent by the moderator but could not find the page to reset password.
    When I used the temporary password, it got me to this page. HELP.
    Thanks.
    Last edited by framkiss1; 06-15-2017 at 09:10 PM. Reason: spelling

  2. #2
    Fuel Injected! jim_in_dorris's Avatar
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    Quote Originally Posted by framkiss1 View Post
    Hello all,

    I have been away for a while and can't seem to find my previous posts.
    Maybe someone can tell me how to find them.
    I am looking for an electrical pinout for ECM 1227747.
    Any help would be greatly appreciated.
    Also, I am trying to reset my password. I entered the forum using the password sent by the moderator but could not find the page to reset password.
    When I used the temporary password, it got me to this page. HELP.
    Thanks.
    here is the page for electrical http://www.gearhead-efi.com/Fuel-Injection/showthread.php?304-1227747-ECM-Information-42

    in the top right side of the gear-head page you will see a settings tab. in settings under your profile is where you will find the place to change your password
    Last edited by jim_in_dorris; 06-15-2017 at 10:27 PM.
    Square body stepsides forever!!!

  3. #3
    Electronic Ignition!
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    Thank you so much for your help. I was able to go in and change my password.
    Now I can look at the 127747 pin out.

  4. #4
    Electronic Ignition!
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    I do not remember if I mentioned this in my previous posts so here goes............
    I installed a GM 350 w/700R4 trans in my Jaguar XJ6.
    Right now it is running with a Quadrajet carburetor and I have acquired all of the necessary pieces minus the sensors to do a TBI conversion.
    I have the following parts from a donor vehicle.
    1. Intake manifold with TBI unit.
    2. Complete electrical harness.
    3. 1227747 ECM.
    4. Small Distributor. (Right now I am running the carbed engine with the large HEI distributor).

    I have to purchase the following: CTS, TPS, MAP, IAC, VSS, KNOCK SENSOR, AND ESC, and O2 sensor.
    I already had the O2 sensor bungs installed on my dual exhaust system. One on each side.
    I am thinking of doing an EGR delete. Should I? or should I not?
    I am also having issues with the ALDL connector since I was unable to to remove it from the donor vehicle completely with the harness, due to time constraints.
    I had to cut the ALDL connector off the vehicle with about 14 inches of the harness and has 8 wires.
    I have already figured how to integrate the power supply switched and unswitched to the Jaguar electrical system.
    I need to know how to patch the ALDL connector to the ECM harness.
    Sometime ago, I was able to pull a color schematic for the 1227747 ECM off this forum but I can't seem to find it anymore. I misplaced it during one of my garage cleanups.

    My plan is to mount the ECM in the engine compartment and only send the required circuits to the inside of the car. I also will be mounting the ALDL in the engine compartment.
    Any and all help/advice will be very much appreciated.
    Thanks.

  5. #5
    Fuel Injected! uncabob's Avatar
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    Try post 2 attachment on this thread for color schematic. I used a combination of the diagrams there.

    http://www.gearhead-efi.com/Fuel-Inj...Information-42

    OBD Diagnostics, INC has some ALDL info.

    Good luck . Bob

    PS pin-out can be found at http://www.gearhead-efi.com/gm-ecm-p...on-wiring.html
    Last edited by uncabob; 06-30-2017 at 07:12 PM. Reason: first link would not link
    Don't force it, get a bigger hammer!

  6. #6
    Super Moderator Six_Shooter's Avatar
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    Don't mount the '7747 under the hood, it's not water tight, nor is it good in hot environments. I'm not sure there is an underhood TBI specific ECM, there are a couple that MIGHT do it, but would require some pretty good understanding of how an ECM functions and modifying the code.

    Just follow the wiring diagrams in the '7747 thread to connect the ALDL to the ECM. I believe there is at least one diagram that shows connections between the ALDL connector and the ECM.
    The man who says something is impossible, is usually interrupted by the man doing it.

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