Vehicle: 94 S-10 Blazer 4x4 with 4.3 and 4l60E tranny
I've been having shifting problems (no first, no 4th). Took off the pan, removed the solenoids, tested them. they both WORK (click click). However I couldn't find voltage going to either solenoid (but it still does a 2-3 shift) as I shifted through the gears with the ignition on. What I am looking for is a wiring diagram for the transmission. Unless someone can steer me to a better direction, I am going to try to look for a short or broken wire in my wire harness. I assume the harness goes right to the ECM? And is that behind the dash?

 

ECM is behind the dash on the passenger side. It's paired with the TCCM.