Lumbar wiring

[SharpRedOne]

I recently installed a 60/40 seat from what I was told was a 96 Chevy PU in my 93 Silverado. It has lumbar support in it. I was wondering if someone knew how this wired up. There are two wires to the switches in the seat a red and a grey. It doesn't work properly when I hook a positive and negative to them. Any ideas would be appreciated. It has been a while since I have tried to wire this up and don't remember exactly but I believe that one side worked but not the other. I can make both sides work by manually applying power to each one separately.
Maybe someone has a wiring diagram for the seat in a 96 Chev!!