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  1. #1
    FEP Supporter vdubn's Avatar
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    Default Help Identifying this Engine Connector and Relay

    Can someone help me identify this single pin connector, the slide on connector next to it, and the relay shown? These are part of the PCM harness that comes through the firewall on the passenger side, and these end up at the drivers side strut tower, by the starter solenoid (thats where the one eyelet fusable link connects).

    Thanks...

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    85 GT Hatchback, T-Tops. Rebuilt 302, 10.6:1, Edelbrock Alum heads, Performer Intake, full EFI swap from 86, 3.73 Posi 8.8, 5 lug Cobra 13" fr and 12.6" rear disc swap, MM SubFrame Connectors, MM Panhard Bar, MM front A-Arms, MM rear control arms, Raceland Coilovers, T5 with Centerforce DF Clutch.

  2. #2

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    The relay is the Wot cutout relay for the A/C. The round connector is the battery ground. I'm not sure about the other single pin connector. Maybe a ground? Do you know what colors are on the wire?

  3. #3
    FEP Supporter vdubn's Avatar
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    The single wire with the U shaped connector is black with a grey stripe, or light yellow, can't tell, but its faded. On the round connector, I don't have a equal-opposite connector that plugs into that... would that connector just go to a ground? Any idea what that other connector looks like? As for the WOT relay, I am guessing I can eliminate that since I am running EFI with no A/C, right? I'm guessing I need to keep the fuseable links.

    Thanks!
    85 GT Hatchback, T-Tops. Rebuilt 302, 10.6:1, Edelbrock Alum heads, Performer Intake, full EFI swap from 86, 3.73 Posi 8.8, 5 lug Cobra 13" fr and 12.6" rear disc swap, MM SubFrame Connectors, MM Panhard Bar, MM front A-Arms, MM rear control arms, Raceland Coilovers, T5 with Centerforce DF Clutch.

  4. #4
    FEP Supporter vdubn's Avatar
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    I think this image might be what I am missing, and here is a link to what looks like a good thread discussing Mustang and grounds:

    https://www.stangnet.com/mustang-for...ations.791485/

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    85 GT Hatchback, T-Tops. Rebuilt 302, 10.6:1, Edelbrock Alum heads, Performer Intake, full EFI swap from 86, 3.73 Posi 8.8, 5 lug Cobra 13" fr and 12.6" rear disc swap, MM SubFrame Connectors, MM Panhard Bar, MM front A-Arms, MM rear control arms, Raceland Coilovers, T5 with Centerforce DF Clutch.

  5. #5

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    Quote Originally Posted by vdubn View Post
    The single wire with the U shaped connector is black with a grey stripe, or light yellow, can't tell, but its faded.

    I suspect its just dirty. I think you'd be surprised how colorful those wires would look after a scrub with some Simple Green.
    That pigtail bit is actually the dedicated ground for the ECU. The negative cable for your car should look similar to this one -

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    Last edited by JACook; 11-15-2017 at 10:52 PM.
    Cheers,
    Jeff Cook

    '85 GT 5-speed T-Top, Eibachs, Konis, & ARE 5-Spokes ... '85 GT CFI/AOD Vert, all factory...
    '04 Mach-1 40th Anny, 34K original miles... '79 Fairmont StaWag, 5.0, 58K original miles ...
    65 notch, 289 auto, Pony interior ... '67 coupe 6-cyl 4-speed ... '68 Vert 307 4-speed...
    (And a 1-of-328 Deep Blue Pearl 2003 Marauder 4.6 DOHC, J-Mod, 4.10s and Lidio tune)

  6. #6
    FEP Supporter vdubn's Avatar
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    Ok cool... since I have my battery in the hatch, I will go ahead and run this ground to the chassis along with the #2 ground wire from the engine.

    Thanks
    85 GT Hatchback, T-Tops. Rebuilt 302, 10.6:1, Edelbrock Alum heads, Performer Intake, full EFI swap from 86, 3.73 Posi 8.8, 5 lug Cobra 13" fr and 12.6" rear disc swap, MM SubFrame Connectors, MM Panhard Bar, MM front A-Arms, MM rear control arms, Raceland Coilovers, T5 with Centerforce DF Clutch.

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