I do not believe you can have a variable gauge and an idiot light function off the same sender.
You need to install two senders in two ports, or use a tee to attach two senders at the same port.
Larry
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.