Caravan (or any) A/C clutch diagnostics

I would check for continuity and then jumper 12V directly into it and see if it engages. Be careful to get polarity correct because many of them have a spike diode in the compressor pigtail, and you WILL blow that "shorted."

It should be a simple matter of 12V to the coil, but if you are not checking it under load, AKA say you are checking it with the connector separated, then there may be a "drop" problem in the wiring/ terminals/ switching.