Turned on my ac no cold air,,,,,i have current to the high and low pressure switches...ac light comes on fan blows clutch does not engage no power to the green wire that plugs in at top..with key on and ac on engine not running..plugged in a refill bottle with gauge and that is showing 30-35....compressor was making a slight rattling last summer but working then..where to go from here.. many thanks ahead:happy160: