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    1/04/2023 12:27 PM  #1

    Hakan
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    From: Långrör, Sandarne, Sweden
    Registered: 4/01/2013
    Posts: 810

    Wiring question

    I have this Camshaft Synchronizer on my EFI converted old 289:
    it came with this connector:
    the problem is that I don't know and can't find any info at least understandable to me on which wire is which of the two black ones from the connector. I've found this picture where it says that one wire should be ground and the other the signal:

    Also found these pictures that I unfortunately can't translate into which wire is which:

    Anyone who knows or can help?

     

    1/04/2023 1:44 PM  #2

    Raymond_B
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    From: Fort Worth, TX
    Registered: 4/01/2013
    Posts: 1,201

    Re: Wiring question

    I went through making one of these work for my Megasquirt. I believe the short answer is it doesn't matter as it is a VR sensor and I *think* swapping the polarity only changes it to falling edge or rising edge. 

    What EFI are you running?

     

    1/04/2023 1:56 PM  #3

    Hakan
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    From: Långrör, Sandarne, Sweden
    Registered: 4/01/2013
    Posts: 810

    Re: Wiring question

    I'm running (or at least going to run) something called a MaxxECU https://www.maxxecu.com/ and here's the wiring diagram for the version I have: MaxxECU RACE wirings.indb

    I was suspecting that it might be as simple as you say, let's see what the others might have to say.

       •Thread Starter
     

    1/04/2023 3:41 PM  #4

    wsinsle
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    From: Belle Vernon, PA
    Registered: 4/01/2013
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    Re: Wiring question

    Raymond_B wrote:

    I went through making one of these work for my Megasquirt. I believe the short answer is it doesn't matter as it is a VR sensor and I *think* swapping the polarity only changes it to falling edge or rising edge. 

    What EFI are you running?

    I was kinda thinking the same. Maybe a positive pulse verses a negative one. Signal so small it couldn't do damage it it's backwards. Did you try and ohm the 2 pins on the cam shaft synchronizer to see if one is grounded? 

    If this forum can't fix it, it isn't broke.
     

    1/04/2023 7:05 PM  #5

    Nos681
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    From: Atlantic Mine, Michigan
    Registered: 7/14/2016
    Posts: 3,329

    Re: Wiring question








    2001 Explorer 5.0L cam position sensor.

    If you can find the factory pinout for this ECM, the color code may help determine which is signal and ground.

     

    1/05/2023 1:28 PM  #6

    Hakan
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    From: Långrör, Sandarne, Sweden
    Registered: 4/01/2013
    Posts: 810

    Re: Wiring question

    Nos681 wrote:

    2001 Explorer 5.0L cam position sensor.

    If you can find the factory pinout for this ECM, the color code may help determine which is signal and ground.

    Thanks a lot!
    That hopefully solved the problem as it says below that the DB/O that I assume means "darkblue/orange" wire is the signal wire:

     

       •Thread Starter
     

    1/05/2023 3:45 PM  #7

    Nos681
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    From: Atlantic Mine, Michigan
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    Re: Wiring question

    Take a look at 91-gray/red signal return

    Ford may have used a signal return to ECM for the “ground”.

    Might be able to verify in schematics or wiring diagrams.

    The 92 Mustang harness used gray/red for signal return to ECM.

    http://www.veryuseful.com/mustang/tech/engine/images/91-93_5.0_EEC_Wiring_Diagram.gif

     

    1/05/2023 3:47 PM  #8

    Nos681
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    From: Atlantic Mine, Michigan
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    Re: Wiring question

     

    1/05/2023 5:29 PM  #9

    Bullet Bob
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    From: Montrose, Colorado
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    Re: Wiring question

    Signal Return may be a good call, Dan.  Looking at one of those pix, it appears to be a red trace on that greyish wire which would correspond to GY/R for Sig Ret.  Normally Ford did not ground sensors except through Signal Return.

    Last edited by Bullet Bob (1/05/2023 5:30 PM)

    "you get what you pay for, good work isn't cheap, and there are NO free lunches...PERIOD!"
     

    1/05/2023 6:21 PM  #10

    Raymond_B
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    From: Fort Worth, TX
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    Re: Wiring question

    Correct, signal return is also known as sensor ground. You want all your sensors to ground at the ECU to minimize voltage offset. 

     

    1/06/2023 3:07 PM  #11

    Hakan
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    From: Långrör, Sandarne, Sweden
    Registered: 4/01/2013
    Posts: 810

    Re: Wiring question

    Many thanks! That also explains why my MaxxECU has all these "sensor ground" connections available in the harness that came with it.

       •Thread Starter
     

    1/08/2023 12:06 PM  #12

    Raymond_B
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    From: Fort Worth, TX
    Registered: 4/01/2013
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    Re: Wiring question

    Hakan wrote:

    I'm running (or at least going to run) something called a MaxxECU https://www.maxxecu.com/ and here's the wiring diagram for the version I have: MaxxECU RACE wirings.indb

    I was suspecting that it might be as simple as you say, let's see what the others might have to say.

    I meant to say, if you have room in your budget for their PDM you should definitely get it. You'll get your money back in greatly simplified wiring and amazing control of the whole system.
     

     

    1/09/2023 7:59 AM  #13

    Hakan
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    From: Långrör, Sandarne, Sweden
    Registered: 4/01/2013
    Posts: 810

    Re: Wiring question

    Raymond_B wrote:

    I meant to say, if you have room in your budget for their PDM you should definitely get it. You'll get your money back in greatly simplified wiring and amazing control of the whole system.
     

    Yes, I've heard of it and looked at it. But I had already made a kind of "old school" complete wiring system when I was made aware of its existence.
     

       •Thread Starter
     

     

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