2007 business class air condition

Ok here it goes .new driver complained nothing coming out of vents blower motor not working.i get in the truck and ac would freeze you out in town.got on the road for about twenty miles and sure enough no air out of dash .drove truck back into shop hooked up gauges and pressures looked good.did notice ac would not cycle.looked down a evaporator box to find temp probe out of evaporator core box and shoved up in the dash.make a long story short I put temp probe back in evaporator box and now it cycles 15 seconds on 15 seconds off.will not get cold.charge level is right control head is good14.00 volts when clutch applied at compressor.here is my question.bulkhead module ac clutch request wire 338j is measuring 10.00volts compressor off and.46 volts compressor on.driving me crazy have no voltage reference to go by.any help would be greatly appreciated.

 

Expansion valve has been replaced .

 

The blower motor is working on all speeds.all acuators are working properly.temp probe ohmed out at 16100 ohms.evap housing filter has been replaced.this truck was bought after lease from Ryder .looks like they replaced control head since the date on the head was feb of 2011.guess they got tired of it shoved the probe up in the dash and let the compressor run constantly .i was seriously contemplating wiring an adjustable temp probe into the system but would really like to have it working like it did from the factory.i have diamond logic but no service link to open hvac to check or try to reprogram bulkhead module.temp probe out of evap box runs constantly temp probe installed in evap box cycles 15 seconds on and 15 seconds off.im getting five volts from temp probe harness with probe disconnected.plug it back in back probe temp probe I get 2.30 volts compressor running goes to 2.50 volts and compressor shuts off .did not understand bulkhead module wire 338 j ac request clutch to have 10 volts ac off and .40 volts ac clutch on.thanks for listening and replies.