Hello everyone.. I have a 1995 Chevy blazer 4w drive 5/95 ..

Can someone tell me where the fuses for the ECM or PCM are located? I have a scanner and was going to scan my blazer but it says there is no response from the Blazer .. So I'm thinking it could be a fuse. My check engine light does not come on even when I first put my keys in and turn to start all Lights in the dash come on but I see no check engine light .. What would cause this? Is it the Fuse...