Your ac clutch will not engage what can you do to find what is wrong?

First, check the electric system, fuses, circuit breaker, and connection to the clutch assy. Chances are your refrigerant level is low and the low pressure cut out switch is preventing the clutch from engaging in order to protect the compressor. You can jump across the terminals at the overload fuse to check operation of the clutch but only for a short period of time in case your system is low on refrig/oil. Evacuate and recharge the system.