won't turn over Question on transmission lock out wiring...

Electrical & Ignition

  1. Mike McGuire

    Mike McGuire Member

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    Hello again Mopar friends,

    While attempting to start the Newport, after the rebuilt motor and trans are installed (with new Electronic ignition), she won't turn over. If I jump the relay on the fire wall with a screw driver, it will turn over, but not with turning over with the key. When I use the key the brake light comes on.... the solenoid does not engage. I have a sinking feeling I may have, in my haste to remove the tranny last winter, have discarded the wire and connectors that get attached to the transmission. Nothing is left dangling underneath either...(rats).. Does someone have a simple diagram for this circuit or know of a by-pass trick? I can most likely pull a wire/connector off of a donor/junk yard car, but I suspect this might be a sort of ignition inhibit function associated from the transmission.

    Thanks, Mike
     
  2. 3175375

    3175375 Well-Known Member FCBO Gold Member

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    Neutral safety switch is likely disconnected. There is a plug that mates to the neutral safety switch, that is mounted on the transmission, just above the transmission pan.
    I suspect that you can find it, connect it, and voila!
     
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  3. Davea Lux

    Davea Lux Old Man with a Hat FCBO Gold Member

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    The '68 Newport should have a single wire lead that goes from the transmission switch to to the starter solenoid. Normally there is a rubber plug that hooks to the neutral safety switch. Check the leads on the starter solenoid, be sure that all are clean and attached, then trace to be sure the lead is hooked to the transmission.

    Dave
     
  4. Big_John

    Big_John Illegitimi non carborundum FCBO Gold Member

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    MyMopar - Mopar Forums & Information - Mopar Wiring Diagrams 1966 to 1971

    Since you say all the trans wiring is gone, I would really suggest that you replace it. It's a single wire to the switch on the trans to the starter relay, and if the wiring is missing, there will be an empty connection on the relay, so that's where it connects.

    No empty connection? Find out where that wire ended up and connect it to the trans.
     
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  5. cbarge

    cbarge World Famous Barge in a Budget FCBO Gold Member

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    For now just ground the terminal at the starter relay for the neutral safety switch to body.
    That way you can run the engine but be careful it will start in gear.
     
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  6. Mike McGuire

    Mike McGuire Member

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    Thanks, sounds like the easy route for now... wouldn't happen to know which terminal that is off hand by chance?

    thanks,
    Mike
     
  7. Big_John

    Big_John Illegitimi non carborundum FCBO Gold Member

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    First, it's one freaking wire... Do it right... The neutral switch is there for a reason.

    Second, if all the terminals on the relay have wires on them, that means the neutral safety switch wire is there... See what I mean? You wouldn't be asking this question.

    Third. it's one freaking wire... Do it right. By the time you screw around running a jumper wire, you'd have the thing connected the correct way.
     
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  8. Big_John

    Big_John Illegitimi non carborundum FCBO Gold Member

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    Temporary bypassing usually leads to it just being left that way.

    Having seen the NSS bypassed and the results, watching an innocent guy riding the hood of a car across a parking lot that someone started in gear, NSS bypassed, it tends to stick with you. Yep, it was just done "temporarily". All he had done was walk by the car.
     
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  9. Mike McGuire

    Mike McGuire Member

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    Good points. thanks again.