Toyota Repair: 2000 Sienna AC Problem, amplifier, clutch

Question
The green light on my ac button starts flashing and the ac clutch dis-engages, If I turn the ac off, then back on it will work for a while, then the cycle will repeat. The Toyota forums point to a bad mag clutch relay. My question is where is this relay located o a 2000 Sienna? I have found diagrams for newer vans, but the relay boxes are different. Thanks, Jeff

Answer
It doesn't use this relay, the compressor is controlled by the a/c amplifier, the three possible items listed are: compressor, drive belt, a/c amplifier.
I have also seen this due to abnormal line oressures, either too low or too high, it should be checked for this first using a/c pressure gauges.