72 K5 compressor switch?

[brodykelly]

i replaced the heater core on my 72 k5 and i didn't unplug what the shop manual calls "compressor switch" and it busted. does anyone know where i can get one at, its located about 6-8 inches to the right of the center hump on the bottom of the heater housing, it points straight up in the housing towards the roof, it has a 2 wire plug going to it, don't really know what it does and the manual doesn't explain, you have to get in the passenger floorboard and look up toward the hump to see it, this is an a/c blazer, don't know if it has anything to do with a/c or not, heater is working fine, any help would be great, thanks brody p.