Please help ac was running great on road trip and now does not blow cold. Pressure is 45 low 150 high clutch does not enengage. I can jump 30 and 87 and clutch will run. I can also ground the high pressure switch and it will engage. Replaced high and low switch no go. Since I'm not getting ground I replaced the pcm. Still no clutch engage. Any ideas please help.

 

Could be a break in the circuit for the high and low pressure switches and the compressor relay coil.

 

Any suggestions on how to test?

 

Any suggestions how to test

 

How good are your electrical skills? All you need really is a wiring diagram for your van and a test meter.

 

I have not been able to find the right diagram. Tried Haynes and all data. Using a volt probe is how I found its a ground issue.

 

I found its the ac clutch switch but they don't make it any more any idea how to make this work

 

The switch on the dash?

 

It's under the hood pasanger side in the upper blower box. It's a probe that goes in the evaporator. The dodge part number is 55036447.

 

This is what I suspected but waited to see. The part you are referrring to is not an a/c clutch, its the evaporator core sensor.

It shuts off the compressor when the evaporator core is about to freeze up and will no longer pass air. Even if you can't but a new one, any evap core sensor from any Dodge van close to this year should work. If not, I'd try Ebay.