What does this switch activate?

Gee...I thought I was the only Formula Vee driver that knew that one!:finga:

I ran a vintage FV1, 1968 Zink C4. I love vintage racing. So many little tricks to those cars. I ran with CVAR out of DFW, great club. www.corinthianvintagerace.com
You can't beat having the guy that is consistently out running you all day, come up and give you a few pointers, and help you tweak the car so you can keep up to make the racing more competitive and enjoyable for everyone.