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How to install tachometer.

Tiny
FRYEBABY623
  • MEMBER
  • 1995 CHEVROLET S-10
  • 89,000 MILES
I have 95 chevy s10. 2.2 4cyl manual. I need to install a tach instrument cluster and my truck did not come with one stock. I know I need to install a wire to my ignition coil but I have 2 coils. One is for the # 1 and 2 cyl and the other is for 3 and 4 cylinder. Which one should I attach new wire to?
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Sunday, May 6th, 2012 AT 6:14 PM

26 Replies

Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
You should connect the wire (might be yellow) to the #1 coil trigger wire which is the white wire.

Please let us know happens so it will help others.
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Sunday, May 6th, 2012 AT 6:20 PM
Tiny
CHEYVROCKS
  • MEMBER
  • 4 POSTS
I found this link helpful.
I have a 1997 Chevy S10 2.2 without a Tach.
I bought another cluster with a Tach in hopes of just plug and play, but after reading this maybe not?
I have not tried to plug and play yet. I was looking at the diagram provided which is helpful and read about the white possibly yellow wire I might need to run.
I am not clear if this wire runs from the back of the connector that the Cluster assembly plugs into, that would make sense but where on the cluster end would that be?
A little more detail on each end needing to be connected would be gratefully appreciated.
I hope to try to plug and play in a few days. We see I guess.
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Wednesday, February 14th, 2018 AT 1:17 PM
Tiny
ASEMASTER6371
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I doubt it will be a plug and play. They did not universalize the harness until later where all options were pre wired.

Roy
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Wednesday, February 14th, 2018 AT 1:19 PM
Tiny
CHEYVROCKS
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  • 4 POSTS
Roy,
Thank you, do you have a diagram at the cluster connector where the wire goes?
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Wednesday, February 14th, 2018 AT 1:40 PM
Tiny
ASEMASTER6371
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White wire from ignition coil. Diagram attached

Roy
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Wednesday, February 14th, 2018 AT 1:45 PM
Tiny
CHEYVROCKS
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  • 4 POSTS
Roy,

Thank You again.
I have a friend whos a certified BMW and GMC mechanic coming to visit Tuesday. I will let him look at the diagrams and hopefully fix me up.
I WILL UPDATE THE RESULTS HERE AFTER HE IS DONE.
CHEVYROCKS
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Wednesday, February 14th, 2018 AT 1:54 PM
Tiny
ASEMASTER6371
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Your welcome. We are here to help

Roy
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Wednesday, February 14th, 2018 AT 1:55 PM
Tiny
ARLIE BENSON
  • MEMBER
  • 11 POSTS
I tried to hook my tach up to the white wire and I get nothing. I read somewhere I may need a different tach
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Monday, April 2nd, 2018 AT 10:51 AM
Tiny
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Ok, where did you hook up the tach wire? Did you ground the tach as well?

Roy
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Monday, April 2nd, 2018 AT 10:53 AM
Tiny
ARLIE BENSON
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  • 11 POSTS
I have a good ground hooked up. I have tried it on the white wire on the ICM. I used the inline splice.
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Monday, April 2nd, 2018 AT 6:51 PM
Tiny
ARLIE BENSON
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  • 11 POSTS
I guess I am not even sure at this point if the tach even works. The illumination comes on when I start the truck but no needle movement.
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Monday, April 2nd, 2018 AT 6:53 PM
Tiny
ASEMASTER6371
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Attached is the diagram for the tach.

Is there a pink wire at the module?

Roy
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Monday, April 2nd, 2018 AT 7:02 PM
Tiny
ARLIE BENSON
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  • 11 POSTS
I believe the pink wire is on the plug with two wires in it
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Monday, April 2nd, 2018 AT 7:05 PM
Tiny
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2 wires? That may go back to the instrument cluster connector. That means it is in the harness that connects to the dash.

Connector diagram attached. Pin 8

Roy
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Monday, April 2nd, 2018 AT 7:12 PM
Tiny
ARLIE BENSON
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This is one plug
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Monday, April 2nd, 2018 AT 7:16 PM
Tiny
ARLIE BENSON
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  • 11 POSTS
This is the other connector
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Monday, April 2nd, 2018 AT 7:19 PM
Tiny
ASEMASTER6371
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Which white wire did you connect it to?

Roy
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Monday, April 2nd, 2018 AT 7:25 PM
Tiny
ARLIE BENSON
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White wire on the end
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Monday, April 2nd, 2018 AT 7:28 PM
Tiny
ARLIE BENSON
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Am I supposed to splice it or cut it out and just have it going to the tach
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Monday, April 2nd, 2018 AT 7:29 PM
Tiny
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You are supposed to tie into it. If you cut it out, it would run only on 2 cylinders

Roy
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Monday, April 2nd, 2018 AT 7:30 PM

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