In my 74 the switch by your left knee controls the brightness for the gauge lights. The other switch turns on the map lights in the underside of the dash just over the gauges and radio. If I rememebr right it also adjusts the brightness of the map light. Keep in mind that my car was rewired once by the previous owner and as a result I am not sure if it came that way new.
Ed...
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.