Pins on a factory tach

Anubis

Royal Smart Person
Mar 30, 2012
2,155
113
West Michigan
Can any of you fellas tell me how i can hook this up outside of the cluster? Trying to wire it temporarily under the hood while i time and tune my engine. Thanks fellas.
Get a multimeter and check each pin receptical in your instrument panel to see which is 12VDC + and ground, The 3rd pin will be the tachometer signal. Your key will need to be in the run position while checking.
 

RustBucket

Greasemonkey
Thread starter
Feb 8, 2018
218
28
Houston, TX
Get a multimeter and check each pin receptical in your instrument panel to see which is 12VDC + and ground, The 3rd pin will be the tachometer signal. Your key will need to be in the run position while checking.
Ok so the pin that has the #3 goes to the "tach" on the distributor, correct?

On pin #1 and #2, which is (+) and which is (-)?

Thanks bud.
 

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O. D. Showtime

Comic Book Super Hero
Feb 6, 2009
2,883
113
Regina Sask. Canada
Ok so the pin that has the #3 goes to the "tach" on the distributor, correct?

On pin #1 and #2, which is (+) and which is (-)?

Thanks bud.

I think what he meant is that after you find out which two pins are 12vDC and ground...the left over pin (third) would be tach signal.

Not sure if you have the tach bracket for that tach or not...but here is a pic of the connections...


Tach Bracket.jpg
 

RustBucket

Greasemonkey
Thread starter
Feb 8, 2018
218
28
Houston, TX
I think what he meant is that after you find out which two pins are 12vDC and ground...the left over pin (third) would be tach signal.

Not sure if you have the tach bracket for that tach or not...but here is a pic of the connections...


View attachment 147428
Oh ok gotcha. I was looking to temporary wire it just to time my car so i wouldn't go fiddling with the instrument panel.
 

bracketchev1221

G-Body Guru
Jan 18, 2018
691
93
Does anyone know where I can find one of those bracket? I would like to add a factory tach to my replace my clock.
 

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