Need help with AVMN II

[TribeamConnek 0]

I am currently working on a build in a 2000 chevy blazer.  Everything has been going well up until now.  I purchased a singer alt and decided to go ahead and purchase a mechman vcm.  Everything has been hooked up to see if the alt was charging and its working fine.  When I hooked up the vcm Im not getting any power to the unit.  I went back to check the wires and to see if I was getting voltage from the ignition feed and everything is fine.  I did notice however that the plug going to the alt only has one wire when its a four pronged plug.  I wanted to know if that was the reason for things not working properly.