98 9400 intermittent A/C

Hi folks. having a problem with my 98 9400. the a/c clutch is kicking out. when travelling at highway speed, and I apply the cruise. When the a/c gets the cab cool enough that the ac kicks out, it will not come back on until I pull over and stop. 98% of the time this happens 2% of the time it works properly. A/C works fine if I drive without cruise. However when I am parked with cruise engaged, to idle up the truck, a/c works perfectly!! stays cold for hours! I used a test light to monitor power from the switch to the clutch, while driving and the power was constant. however the clutch still disengaged.

Any ideas why the clutch is disengaging while it still has power? does the a/c control go through the cluster or the computer?

usually the a/c works properly with cruise on if the ambient temp is low. is there an ambient temp sensor involved in this circuit?


the temperature switch on the condenser is working properly.

Any ideas?

would anyone have a link to a wiring schematic for the a/c?

 

I should mention I have the equipment, and a refrigeration ticket that says I know how to operate it. system is full of refrigerant, there are no leaks, and it is not freezing up.

ANYONE with a schematic?

 

I have been struggling with this problem for quite some time now, and I have checked all the mechanical components. I recently replaced the compressor clutch, as it burnt out. when the compressor kicks out, it still has power coming from the temp sensor, which tells me there is something else between these components that is cutting the power to the clutch. mechanically it works perfectly fine. I ONLY encounter problems whilst driving. when parked it works for hours.... if it WAS freezing up, it would freeze up quicker parked!! I am quite certain its electrical.. that's why I Need a schematic. Kinda hard to follow wires when they disappear into harnesses.

WOT the system is FULL of 134. that is the FIRST thing I checked. I will not apologize for being right! I am not a NEWB or someone that has no mechanical experience. I was just looking for someone who may have seen a similar problem. Changing all the parts is NOT troubleshooting. HENCE my request for a schematic.......

 

I do not know What is APADS?