Re: Tac.

[Dave Casey <dcasey@xxxxxxxxxxxxx>]

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It sounds like an aftermarket tach that came on a Ford as most of the 
original ford tachs of the era used a ground and the positive side of the 
coil and nothing more, save for lighting.
I would wire it as Bob said and it should work.

Dave Casey

----- Original Message ----- 
From: "Bob Crockett" <bcrocket@xxxxxxxxx>
To: <1962to1965mopars@xxxxxxxxxx>
Sent: Sunday, July 24, 2005 11:20 PM
Subject: Re: Tac.


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polara_hotrods@xxxxxxx wrote:

> On a 17 year old budget you can guess I don't have the bucks for a new 
> tac.

> Well, my grandad gave me one that mounts on the steering wheel, exactly 
> what

> I need. It came out of a Mustang unfortunately (it was a factory tac),

> I can't seem to grip how to wire it up though. I know two wires have to go

> to the coill. No problem there, only which two??? I have four: white 
> orange

> green and black. Anybody got any ideas here??? Thanks.

I dunno about the tach wiring on a Mustang, and I don't guess a brand F
tach would do irrepairable harm to your Polara, but the wires on my
cheapie tachs from "AwfulZone" have black, white, RED, and green wires.
 On them, the Red is to a switched +12 volt source, the Black is
ground, Green goes to the coil _negative_ terminal, and White is to the
dashboard lights for the light in the tach.  Note, only ONE wire goes to
the coil; the Green to the coil negative.

In my experience, the coil negative is pretty commonly used for tach
signal, but that is no guarantee that brand F didn't do it differently.
The best source would probably be a Factory Service Manual for the
Mustang.  OTOH, maybe someone else here knows for sure!  I do recall the
instructions for those AwfulZone tachs saying "don't ground the green".

Good luck!

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----
Please address private mail -- mail of interest to only one person -- directly to that person.  I.e., send parts/car transactions and negotiations as well as other personal messages only to the intended recipient, not to the Clubhouse public address. This practice will protect your privacy, reduce the total volume of mail and fine tune the content signal to Mopar topic.  Thanks!

'62 to '65 Mopar Clubhouse Discussion Guidelines:
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bOyW3N.