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Thread: My coyote won't start and I need some help- Ford now wants the harness back

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    Senior Member Blitzboy54's Avatar
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    My coyote won't start and I need some help- Ford now wants the harness back

    Like the title says I turned the key this morning and nothing happened. I started troubleshooting and found I am not getting any power to the starter lead to the engine solenoid. I do have 12v at the big lug as that is a direct run from the bus attached to the battery. Here is what I have tested so far.



    Clutch safety switch - Verified it's open and goes to close when depressed. To make troubleshooting easier I have put a wire jumper in connector C257 so that switch is now always met.

    Blue starter wire - Verified this is connected to blue SMR wire. I also verified when the key is turned to start that I am getting 12v

    Orange EFI wire - Verified this is connected to the Ignition Relay Trigger. 12v is present when the key is set to run.

    Ground - I was really careful to check every ground during the build. I have 5 different grounds on the control pack harness. Everyone has been tested to the battery lead. I have some other grounds in common but all my individual accessories work so if it was a ground issue I would think it would show up as having other problems as well.

    Control pack fuse box - I have 12v at the fuse box at all times.

    Fuses - I pulled and checked every fuse in both the PCM and RF fuse panel.

    Inertia switch - Checked it, but even if it was open that would just keep the fuel pump from coming on. The fuel pump does not come on when the key is turned. I do know the pump works because I tested it with a power supply to set the pressure and check for leaks.

    OBD port - I put a meter on the OBD port looking to see if I was getting a code. This is the most disconcerting part. The meter isn't getting any power, even with the key in run.

    I pulled every connector and re attached, I cannot find any bent pins or opens. I used this control pack with the first engine I purchased on the dyno. The engine never ran but it turned over.

    I really need some troubleshooting help. What I really need is a controls pack schematic.
    Last edited by Blitzboy54; 02-08-2025 at 06:20 PM.
    Build 1 MK4 #10008 - Delivered 03/03/21, Graduated 7/20/22 - Sold 6/6/24
    Build Thread #1 https://thefactoryfiveforum.com/show...been-delivered
    Build 2 MK4 #11061- Delivered 08/24/24
    Build Thread #2 https://thefactoryfiveforum.com/show...006#post562006

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