Hi all. This is my first time on this site and first post. I just bought a 2000 Zr2 Blazer. I mainly bought it for those rough winter days and to haul my boat in the summer. I was told up front from the previous owner that the 4wd wasn't working. He was sure that it was the transfer case motor and had already removed it. I found a different t-case motor that was taken out of a truck with 76,000 miles on it. I put it on and nothing. The one thing I noticed though that none of my 4wd indicator lights on the switches are on. I have nothing and nothing happens when pushing the buttons. I thought that it might be the control module but I want to get some other people's opinions on what it might be. Bare in mind that I am not very knowledgeable when it comes to vehicles and working on them so any insight would be greatly appreciated. Thanks.
Brad

 

This topic has been covered in many other threads. Please try the search function and see what you turn up. If you have the 3 button switch on the dash, then search for "NV233". If you have the 4 button switch on the dash, search for "NV236".

 

Thanks for the reply. I did the search and am still trying to decipher a lot of the info. I have decided to replace the tccm and was just wondering if anyone knew which wire was the ground wire in coming from the plug. I want to make sure I have a good ground connection before hooking up the other tccm. Thanks.