From: Bob Crockett <bcrocket@xxxxxxxxx>
Reply-To: 1962to1965mopars@xxxxxxxxxx
To: 1962to1965mopars@xxxxxxxxxx
Subject: Re: Tac.
Date: Sun, 24 Jul 2005 23:20:24 -0500
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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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