Nissan Repair: air conditioner, hall effect sensor, test light

Question
Not geting power 2 compressor and it is not kicking in put new relay in and checked gas and fuses

Answer
Matayea,

Check to make sure the switch is working and the fuse is good.  I know you checked but a test light is vital for stuff like this.  I want to make sure the switch is good.  If you have an older Nissan there is a hall effect sensor on the compressor and if there is a 200 RPM difference from the pulley to what the RPM of the engine is the computer will not allow the compressor to kick on.  Further, check the harness at the compressor to make sure there is power getting to it.