Analog TC Gauge Cluster Harness Pins

Found a schematic that labels the pins on the Turbo Coupe gauge cluster plug/harness connector from 1-18 and gives them a color designation but they do not say what they are used as and for. I am trying to get my tachometer working again, I have an aftermarket tach that is hooked up but my stock one does not work at all. There are no cut wires that are obvious which to hook it back up. I have been using search for over an hour with no luck. Just looking for a wiring diagram that explains each pin!

Thanks in advance

UPDATE

Was directed to this article. Wonderful!

http://www.coolcats.net/reference/cl...alog_4cyl.html