Anyone help with hooking up a Tach ?? I have a 84 Monte & I got a tach out of a SS I want to put in. Mine has 2 metal pins on the back plastic and the SS has 4 metal pins.(see pics) 2 of the pins are marked with a - & +. what are the other two pins for ? Since mine has only 2, How can I wire it up to work ?

 

I am sure someone will post. I am not sure as I installed an aftermarket tach in mine and did not use the cluster wiring.

 

got it figured out

 

How did you wire it up?

 

Just Got the SS plastic back plate with the 4 pins on it, Then since my car didn't have an original tach, I ran a wire from the distributor to the white wire in the factory harness !!

 

Cool! Thanks for sharing