Hello, I trying to trace the 12v line to the AC Clutch looks like Low Pressure
Switch is ok, I did not know where the High Pressure sensor was located
until I found this Pict, however there are 3 cables there, so does
anyone knows which one is the High Pressure Sensor, and how
remove it for testing?

 

At the bottom of the condenser you should see three sensors - Magenta, Gray and brown.

The magenta switch is the safety or high pressure shut-off switch
The grey switch is for the engine cooling fan at high speed.
The brown switch is for the engine cooling fan at low speed

The low pressure sensor is up near the firewall by the collector. Normally you'd jumper the low pressure sensor to get the compressor to kick on (say when you are recharging the system).