Oops, there's more
schematic, it's for an 84, but it's better than nothing:
http://www.pelicanparts.com/944/elec...l_diagrams.htm
I suggest you copy and print out all the sections, tape them together. It'll make life a lot easier.
Pop off the hose, get a pair of Master Cylinder snap ring pliers (ill see if I can find a picture) and learn some new four letter words. Now, you're not supposed to run w/o a thermostat but there's a grey area for diagnostics. Good Luck!