Need help with my Freinds '93 Chevy s-10 Tach. install

[OilPatch197]

:Yeah yeah, I know this is a Ford forum, but I got a buddy that wants to install a aftermarket tack tommarow afternoon in his 1993 GMC Sonoma(basically a S-10)

I kinda looked at it, can somone explain how to do this, I got a general Ideal, two wires go to the distributor one is hot when Ignition is on and the other is a signal wire to the Ignition coil, that is the wire I need to tap into.

It has a chevy 2.8 and a distributor and a coil in the back, seems like only two wires come from the distributor to the wire harness. If I turn the key on, the wire that is not energized, it's the one I hook the tachometer into?

 

[baddis]

there should be a tach output on the cap one wire is for a light and the third is a ground. make sure you have the tach set on 6 there are 3 options on it for 4 6 and 8 cyl engines

 

[OilPatch197]

It is a Chevy S-10 with a 2.8v6 it has no "tach" output at the distributor. It seems to have only two wires going to the coil, maybe EST ignition I can't tell. (coil pack is separate from the distributor, so it's not HEI)

I've always been told to connect the signal wire into the (-) side of coil. I guess that is what we will do, sound right?

there is no "white wire" and no tach connection.