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Thread: Last chance to help save 200 rivets!

  1. #1
    Member exwestracer's Avatar
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    Last chance to help save 200 rivets!

    I'd asked in my "rebuild" thread about a "hot in run" lead that runs over the top of the (stock Ford) fuel tank. I haven't been able to find it on any wiring diagrams, and I can't see any reason for it. I also can't see where it goes....

    I'm hoping somebody else who has built one of these cars might be familiar with what that lead is for. It goes directly to a fuse under the dash, and it is hot anytime the ignition is "on".

    If I can't figure this out tonight, I'm going to remove the fuel tank cover panel...which I really DON'T look forward to.
    Straightening out a hack job build on a Type 65 Coupe...HELP!

  2. #2
    Administrator David Hodgkins's Avatar
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    Fuel level sender?


    FFR 5369 Pin Drive, IRS, Trigos, Torsen, Wilwoods, FMS BOSS 302 "B" cam , Mass-flo. CA SB100 (SPCN) Registered
    Delivered 4/23/06. It's ALIVE! 11/9/2008. IT MOVES! 11/16/2008. Plates! 1/2010. Body is at the bat cave! 1/2012. Featured at HB Cruise-In 4/2012

  3. #3
    cobra Handler skullandbones's Avatar
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    It's got to be the fuel level sensor like David said or the fuel pump. There aren't any other circuits that are supposed to be in that area except lights. But you did say someone was had done some rather creative wiring!!! WEK.
    FFR MkIII 302 (ATK), EFI 75mm HolleySystemax 24# injectors, 4 tube BBK ceramic, cold air sys, alum flywheel, crane roller rockers, T5, Wilwood pedals, 95 Cobra rear, 4 rotors, coil overs, power steering, alum FFR rad, driver's crash bar mod, mini dead pedal mod, #6046

  4. #4
    What about the inertia/rollover button. My button is located under the dash near where the frame serial number is and runs to the electric fuel pump near the tank. Has that button been removed and replaced by a fuse.

  5. #5
    If it's a donor harness and know what year I have an EVTM manual that I can fax a wiring diagram to you.
    Go Fast Part and tech Specialist gordon@levyracing.com
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  6. #6
    Member exwestracer's Avatar
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    I know for sure it is NOT the power feed for the fuel pump, or the trigger wire for the pump relay. I have a 90 Mustang harness diagram, and it shows only a ground side wire for the sender (which is typical). The American Auto Wire harness that the mess is based around shows exactly the same thing.
    Straightening out a hack job build on a Type 65 Coupe...HELP!

  7. #7
    What color is the wire? I bet someone ran it back there for a future power source. Why not just pull the fuse and leave the wire?
    Mike

  8. #8
    Member exwestracer's Avatar
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    Quote Originally Posted by michael everson View Post
    What color is the wire? I bet someone ran it back there for a future power source. Why not just pull the fuse and leave the wire?
    Mike
    Mike,
    The wire is pink with a gray trace. It's not in the Mustang or Auto Wire diagrams....

    That's the general idea, I've eliminated a half dozen fuses and a couple of relays already. I'm just wracking my brain to figure out if it's something I CAN'T eliminate.
    Straightening out a hack job build on a Type 65 Coupe...HELP!

  9. #9
    Is it coming out of a ford fuse box or a painless type fuse box?
    Mike

  10. #10
    Senior Member riptide motorsport's Avatar
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    It might be a ron francis harness from FFR, check his diagram. I believe the roadster has the same basic wiring harness from Ron FRancis/FFR. Ask in the roadster forum also.
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  11. #11
    Member exwestracer's Avatar
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    It was wired into the generic Buss fuse panel that I did away with (see arrow in pic).
    old wiring arrow.jpg
    It's NOT part of the American Auto Wire fuse box and harness. They don't use any tracer stripes on their wires.

    Anyway, the rivets get to live another day at least. Just spent 4 hrs digging and breaking concrete to find out where the water was coming into my basement. STUPID RAIN.
    Straightening out a hack job build on a Type 65 Coupe...HELP!

  12. #12
    Member exwestracer's Avatar
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    dingdingding...Hodgkins is our winner!

    Well, I know it's been awhile; but if anyone's interested the mystery has been solved. A friend came over with one of those lighted borescopes, and we found that whatever type of fuel level sender that was installed in the fuel cell takes a 12V+ lead. There are terminals labeled GND and POS (fitting...) on top of the sender unit, and that's where the mystery wire ends up.

    Not too familiar with that type of sender, but somehow the possibility of a short causing a spark INSIDE the cell doesn't seem too keen. Oh well, that ISN'T coming out; so I hope it ends up being safe.
    Straightening out a hack job build on a Type 65 Coupe...HELP!

  13. #13
    Could be a capacitance sender like this from Speedhut

    http://www.speedhut.com/ecommerce/pr...iversal-Sender

  14. #14
    Member exwestracer's Avatar
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    Quote Originally Posted by MVRight View Post
    Could be a capacitance sender like this from Speedhut

    http://www.speedhut.com/ecommerce/pr...iversal-Sender
    That does look like the same writing and the same type of connections. Thanks!
    Straightening out a hack job build on a Type 65 Coupe...HELP!

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