I replaced the blower motor on my 94 Chevy Blazer (fullsize K1500, 5.7L) and now it wont start. The blower motor now works fine with the key turned, but engine wont start. It spins over but will never start. The battery has plenty of juice and I've tried jumping it, but I dont think that is the problem. When you replace the blower motor is it possible to damage the ecm? I started working on it before I realized the battery was still connected, I hope that didnt damage the ecm, or something else. The service engine light doesnt come on when you turn the key and I think it usually does. I wonder if it needs to be reset or unplugged. It was running fine before. Thanks for any help.