just needing infor on where to find a scematic on the wiring and find the poper proceedure on checking it the computer

 

Details? We need some in order to help you... Vehicle info including what transfer case you have...

 

its a 2003 blazer transfer case i dont know but it has 4h 4l and 2h high on the switch it doesnt have the auto i check the conection on the tcm it been repaired before one terminal on it was corroded just want to see if there any power coming to it

 

Search for NP233 or NV233. You should find the relevant documents in other threads. Maybe try NP233+diagrams or NV233+diagrams. Add more + phrases on to refine your search.