Thanks for the response. The pics arent showing up, but yes, I know where it is. I havent inspected the module yet.. but that is where I was going to start. I have heard on a few forums that there is a good chance for corrosion.... However, being that I heard the clicking sound when I pushed the 4x4 button (as normal), I thought that mean the module was working.. and it might be a different issue. Say the TCCM checks out okay, could it be the motor (not sure what it is called-- transfer case motor?) that kicks theXXXXXin at the tranfer case? I dont know exactly what that looks like or where it is- but I'm thinking it shouldnt be hard to find.
Anything else to look for if it isnt corrosion on that module?