Tach Signal

[JakePSD]

What wire do i use for the tach signal? Its an 89 with a 4 cylinder. I've read that its supposed to be a black/yellow wire but nothing like that exists going into the coil pack. Ive got 2 brown/red and 2 red/green. One of the red/green is on a plug by itself, and the other 3 are together.

 

[JakePSD]

I just found the other coil pack (Im new to these engines) and still no black/yellow wire.

 

[JakePSD]

Nevermind. I just found the tach signal wire. I just said F it and started going through every wire going into the firewall.