I'm going to replace all the switches and gems, sand all the grounds, and hope that everything turns on again!

One question though...I have a row of 4 toggle switches on my car at the top of the switch panel:
1) Wipers
2) Panel Lights
3) Fog-lights (currently not connected - but will be soon!)
4)??????

What is the 4th toggle switch for? Can't find it on the wiring diagram either...


1965 Plus 4
2008 997 Turbo Cab
1981 Alfa Spider
1954 Austin Healey 100 (SOLD)
2013 M3W (SOLD)