A/c has full freon but the compressor clutch wont engage. i have found that the plug going into the compressor is not getting any power. what could be the problem?

On the low pressure line of the ac you have a pressure switch which allows the compressor to come on once a certain pressure is reached, and it will cut the compressor off if the pressure is too high or too low. Look at your ac hose and find the switch *you will see wires connected to it* you may need to replace this switch. You can use a test light to see if you are getting power to the switch. You should check you fuses, and the ac relay witch is usually in a black plastic box under the hood.

Manually run one wire from the positive side of battery to one of the wires of the clutch connector, one of them should complete circuit and clutch will engage. if clutch engages, good clutch then. if not, then replace clutch. if it works then locate the low freon switch, unplug the connector and jumper the plug, clutch should engage. if it does then switch was bad. if still no engage, then problem is before that switch, probably the tenp control computer