1987 turbo:
this problem is the result of about a month of me trying and trying and trying to get my stupid AC/heater to work (I guess after four years of having it broken, sweating and freezing my ass off in phoenix, arizona i should just accept it's failure and get a fan at radio shack that plugs into my cig. lighter and call it a day, a very hot day).
i started on this challenge by taking apart the interior of my car to get to the ECU so i could replace the melted housing for fuse16. When my blower did not turn on when i installed the housing and the fuse i was disappointed. whether or not i have refrigerant left in the system i don't know, but whether there's any or not shouldn't i at least have my blower blow some air, hot or warm? so i never have really investigated under the hood so i don't know if the compressor or the clutch are working, but i still figure the darn blower should work regardless.
so then i looked at everything else i could to determine why the blower was getting no power. i looked at the switch on the dash that lets me select fan speed and defrost, etc.(odd amounts of voltage coming from the test points); i looked at the vacuum hoses that control the vents(all look ok); i applied 12V to the blower directly and it blowed! but then the vents didn;t work and besides i can;t drive around with a wire running from the ECU to the blower directly.
then i looked to the ACC unit under and behind the glove box. this thing looked to be working correctly (as i turned the dial on my dash board to select the temperature the little arm and spring assembly would slide left and right acordingly (of couse there was still no heat or ac because the blower doesn't blow)). but i thought i should take it out (the small amplifier thing with resisters and a diode and a damper potentiometer thingy and other stuff soldered onto it) to look for damaged solder. looked, no damage.
so i put it back in...PROBLEM IS: there is a black round diode thing on the amplifier that has teeth on it, like a sprocket, that in turn pushes the teeth on a sprocket that then turns the arm and spring assembly to the left and the right according to the temperature i select on the dash. BUT! i didn't note where the black sprocket was turned when i took it out and i didn;t note where the sprocket on the arm assembly was turned either! so now that it's back in i don't know if i possitioned the black sprocket correctly so i don't know if the arm can move like it used to. in fact, it now always moves to the far right, the defrost selection!!!! no matter what temperature i choose at the dash.
i unplugged some wires that run to the ACC to that the ACC won't work and so the arm won't travel to the high heat side, because though the blower doesn't blow, the high heat selection still sends hot air out and when it's 103, i don't exactly need any extra heat.
anyone have any experience with this little amplifier and what i might have done to break it and also to what point i should turn the black sprocket so that when it turns it will turn the arm spring assembly sprocket to tfhe correct position?

sorry to be so long-winded, i just get frustrated with all the things i've tried and it still won't work
thanks
trina