Thanks Marlin!
I should have mentioned that I do not have an original tach. It is an Autometer tach. I traced the wires (after having the whole car rewired with an American Autowire universal kit) and found out that a connection under the dash was faulty. But many thanks for your help.
Steve
PANTERA INTERNATIONAL
A DE TOMASO CAR CLUB
Presents the De Tomaso Forums
The On-Line Meeting Place for De Tomaso Owners and Enthusiasts From Around the World
Clicking on the banner will take you to the sponsor's website.