Ac pressure cycle switch

[shoclown]

i am in the process of repairing my ac ( the copmpressor burned up) after repalcaing the compressor, reciever dryer etc and recharging it the ac does not work. i checked the fuses under the dash. all okay i dont have power to the compressor coil. i also replaced the iircm with another and still doesnot work. i checked for power at the cycleing switch and there is no power to the cycling switch. the wiring diagram on alldata shows the power coming from a source not listed on the diagram???? the car is a 1989 before april production. i have automatic air conditioning (kind of) does any one know if there is a fuse or relay that is not in the fuse block? i checked the power at th iircm and ac outputs the look okay have power???????any ideas

 

[38SHO]

well if u got power at all other places besides the switch, then that is probably the source of your problem, I just had to replace mine.....

also you could be have too low of a pressure and its just not activating.... are you sure you know what your pressures are? you can take off this switch with the system still charged up so thats a good thing... its a tight squeeze, I know my aftermarket radiator left a couple scratches on my hand from this job, also some of them have an adjustment on it, but I only advise trying this if you know your pressures and can watch them while its running...

 

[shoclown]

I am sure the pressure is where it shoiuld be i reclaimed all refrigerant pulled vacuum and recharged to specs.
if i jump the switch noting happens...becouse i dont have power to the switch.where does the power come from??

 

[rubydist]

Did you replace the expansion valve (orifice tube)? When the compressor craps out, the orifice nearly always gets plugged and must be replaced prior to getting the a/c to work again.