97 corolla Tach Wiring?

[C-rag]

I have a 1997 corolla that I bought a tach for, and i'm wondering if anyone knows how the wiring goes to the distributor, or which wire it is. Any feedback or wiring diagrams would be appreciated!

[veedubmechanic]

read my post on non tach to tach install... its good

[joykill]

if its an aftermarket tach i beleve there are four wires
black:ground
red:acc
yellow:12v power(straight to battery)
green:negative side of ignition coil

[C-rag]

i want to know what is considered the negative side of the ignition coil? does anyone have a detailed summary? or a picture or something? It's an aftermarket tach, that gets mounted on the dash of my car. I want to know how to hook it up to the distributor, I have the rest figured out.

[veedubmechanic]

you can just tap off the ignition module on the wire I posted on for my post. Its about 15-20 posts down or so "non tach to tach install."

One of the pictures I took of the ignition module and the wire to tap off of for a tach signal.

[joykill]

the negative side is clearly marked with a (-)