I had the exact same problem. I discovered that the orange and pink wires on the console switch were wired backwards. When I corrected them, the problem was gone... go figure.
-William
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.