2005 kubota m9000 ac will not come on

I have a 2005 Kubota m9000 and the alternator went out and now the ac will not come on dune put new alternator and new battery and a new climate control switch and still no ac need help please
 
Was it working before you changed the alternator and was that say in the last couple days/weeks?? If yes you may have knocked a wire loose or some such thing. If you have not had the AC on this year it could for low on 134A which will also cause that
 

Have you checked for a blown fuse or open circuit breaker? One needs to check pressures to be sure AC system has adequate amount of refrigerant. One could ""briefly hot wire"" comp clutch to determine if it will engage.
 
the ac was working good till low volts and quit now all that is left to change out is the amplifier the light is on the ac button but the compressor will not engage
 
Well first of all have you got a service manual. You have to start at the battery then make sure the OUTSIDE fuse is good then check the ones in the cab, then go to the switch. You say the blue light comes on , so next the relay . Just have to work you way down the wiring system. Real easy to check and see where you have power with a simple test light.
 

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