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Old 04-04-2005, 08:01   #1 (permalink)
Joe
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Wire to manual transmission in 1972?

I have a 1972 Ford Mustang, 351C-4V, 4-Speed manual with a Hurst
shifter. There are two wires that connect into the manual transmission
- purple and light green. I can't find these wires anywhere in the
wiring diagram. Anyone have any idea what these are? The reverse
sensing switch is on the shifter, so its not that.

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Old 04-04-2005, 10:01   #2 (permalink)
Big Al
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Re: Wire to manual transmission in 1972?


"Joe" <lanser1996@joltmail.net> wrote in message
news:1112624837.637902.254210@g14g2000cwa.googlegroups.com...
>I have a 1972 Ford Mustang, 351C-4V, 4-Speed manual with a Hurst
> shifter. There are two wires that connect into the manual transmission
> - purple and light green. I can't find these wires anywhere in the
> wiring diagram. Anyone have any idea what these are? The reverse
> sensing switch is on the shifter, so its not that.
>


Some 70's cars had a transmission switch to change spark advance in high
gear. (Some were third and high.) You can remove the connector and check it
with an Ohmmeter.

Al


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Old 04-04-2005, 12:01   #3 (permalink)
351CJ
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Re: Wire to manual transmission in 1972?

Joe wrote:
> I have a 1972 Ford Mustang, 351C-4V, 4-Speed manual with a Hurst
> shifter. There are two wires that connect into the manual transmission
> - purple and light green. I can't find these wires anywhere in the
> wiring diagram. Anyone have any idea what these are? The reverse
> sensing switch is on the shifter, so its not that.
>



If you don't get it figured out, give Dan Williams Toploader
Transmissions a call. He can answer all your questions.

http://www.toploadertransmissions.com/

206 East Dogwood Drive
Franklin, North Carolina 28734
Phone: (828) 524-9085
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Old 04-04-2005, 16:01   #4 (permalink)
TM
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Re: Wire to manual transmission in 1972?

Look at 705-2 in the wiring diagram. I have them on my 1972 and I'm pretty
sure they're for the seatbelt light. The circuit should be open in neutral
and closed in any gear. The timing circuit referenced earlier is a brown
wire.

"Joe" <lanser1996@joltmail.net> wrote in message
news:1112624837.637902.254210@g14g2000cwa.googlegroups.com...
>I have a 1972 Ford Mustang, 351C-4V, 4-Speed manual with a Hurst
> shifter. There are two wires that connect into the manual transmission
> - purple and light green. I can't find these wires anywhere in the
> wiring diagram. Anyone have any idea what these are? The reverse
> sensing switch is on the shifter, so its not that.
>



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Old 04-05-2005, 07:01   #5 (permalink)
Joe
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Re: Wire to manual transmission in 1972?

So you're saying that the seatbelt light would only go on if the car is
in gear? Interesting. I'll look into that.

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Old 04-05-2005, 21:01   #6 (permalink)
TM
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Re: Wire to manual transmission in 1972?

Yes 72 and 73 have sensors in the seat belt retractors and a switch under
the passenger seat. The transmission energizes the circuit with the light
and buzzer. If the seat belts aren't extended and the car's in gear, the
light and buzzer go off. 73 went one step further with a starter interlock.

"Joe" wrote in message ...
> So you're saying that the seatbelt light would only go on if the car is
> in gear? Interesting. I'll look into that.
>



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