Dash Tach Wiring Help

390 & up cid Monster Motors

Dash Tach Wiring Help

Postby 66pacecar » Thu Oct 05, 2017 9:57 am

I have a NOS factory dash tach that I just acquired and it has 3 wires:

Red with male bullet connector
Black with female bullet connector
and Blue w/black stripe that has male bullet connector

I have searched many articles and schematics online and everyone has different opinions.
I don't want to burn out the tach as it is NOS.
Can anyone help or provide correct installation of wiring?

Thank you!
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Re: Dash Tach Wiring Help

Postby poboyjo65 » Thu Oct 05, 2017 10:26 am

The important wires are the red & black. the other is for the light in it. this the way I hooked up mine.

Image

Image
Image
347, 4sp, 9''......
JOHNO
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Re: Dash Tach Wiring Help

Postby Lip Ripper » Thu Oct 05, 2017 11:55 am

That's weird. I always picked up the signal on the - side. On aftermarket tach's that is.

I looked in my 66 shop manual and nothing about the tach is mentioned.
66 Cyclone GT; 245/60R15's on 15x8's and 215/70R15's on 15x7 Magnum's.
There's nothing like the sound of a pushrod V8 singing at the top of her lung's.
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Re: Dash Tach Wiring Help

Postby poboyjo65 » Fri Oct 06, 2017 11:13 am

Lip Ripper wrote:That's weird. I always picked up the signal on the - side. On aftermarket tach's that is.

I looked in my 66 shop manual and nothing about the tach is mentioned.


newer aftermarket tachs are different. I used a faria tach, same co. that makes tachs for ford, made in the 60's & it had the same diagram on the tach itself.
Image
347, 4sp, 9''......
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