How do I manually ground out my ac compressor on my Jeep?

I have a 99 jeep grand cherokee and the jeep mechanics tell me the ECM is not sending a signal to ground the compressor, and will cost $800.00 to fix. So I figure if I manually ground it out then set up a toggle in the cab this would work. I do not have the cash to fix it right now and summer is here. Any help would be appreciated.|||The computer actually grounds the ac relay to turn on the compressor. If you hook up a toggle switch you will have to apply 12 volts to the compressor clutch.Disconnect the connector going to the compressor and isolate it. Don't feed power back into the circuit. Watch your engine temp and don't let it overheat. If it has an aux fan you might want to jump it also. Remember to fuse the toggle switch with an in-line fuse.|||Not a good idea. The a/c system works on pressures. So if you toggle it and leave it on you could blow the whole system costing you alot more money