I can't find anyone, or know anyone that has added a tach to a Zetec. It would probably be similiar to adding one to a Duratec so you might try the performance forums.
This topic is regarding factory guage clusters that have a tach in them. They were few and far between if you had an ATX...the MTX got them standard I believe. And the Mystiques all had them from what I've seen. I got my new cluster from a 99 Mystique Zetec ATX and it works perfect..basically a 'plug n play' deal except for swapping out the speedo/odometer circuit board.
