Cadillac Repair: 94 Eldorado AC Problem, air temp, pressure sensor

Question
Hi, my 94 Eldorado's AC is giving me a fit. One time you start the car, the AC works great, then next time it may or may not. When not working the compressor is not engaging, although the blower ramps up and seems to blow out of all the right vents. You may be riding down the road and it will start working and you never know when it will not cool. I've changed the Ambient Air Temp Switch and the Cycling Switch, and no better. I am thinking possibly the AC Programmer Module is bad, but cannot locate the part on the car, can you help me locvate it? Could the Programmer be my problem, or maybe another component? Any help is GREATLY appreciated. Thank yoy, Daniel Autry

Answer
Your fault is more likely to be the LOW PRESSURE SENSOR. You will need simple electrical schematics, Test procedures and picture locations of the components within the system that is causing you problems of which can't be done on this website which only allows one picture. I do not have a website so you will have to e-mail: onlineautohelp@msn.com in order to obtain the information.