91blazer91

I have a 91 chevy s10 blazer with the 4.3 v6 LT Tahoe addition. For some reason i can only pop my rear window while in reverse? Im guessing this is the neutral safety switch, but im not sure where its at? I have multiple wiring diagrams, but i can seem to find it. Also, after starting, when i want to turn the blazer off, i have a really hard time turning the ignition to the off position! Is this all from the neutral safety switch?! Thanks! Also could i maybe get a pic of were the switch is under the column, because that would help alot! Thanks!!!