John Deere A/C issue

[Makers Acres]

I’m helping a friend with his John Deere 333G. The AC was acting intermittently on a hot summer day and I figured it was probably a low refrigerant issue. When I opened up the machine, I found the compressor was never engaging. I disconnected the power plug and was never able to read 12 volts with the machine running and toggling the AC switch. When I put 12v manually into the clutch I can hear it engage. I checked the fuse and it is fine. I tried finding the relay, but no luck. Do any of you know where this is or have the full wiring schematic? Or perhaps any other suggestions?

Thanks!

 

[mg2361]

Has the pressures been checked? Did it get cold when you hot wired the compressor?

Complete serial number required to get schematics.

 

[Makers Acres]

I had a gauge on it on the low pressure side and it was high, but the compressor was not running at the time, so I figured that was normal. When I hot wired it I heard the clutch engage, but I was not running the engine at the time. I did not want to force it to do something if a safety system was preventing it.

Serial is 1T0333GMEMF393914

 

[mg2361]

Check your messages.

 

[Makers Acres]

Thank you!

 

[Makers Acres]

Well I looked over the schematic and I was hoping to find a hidden relay somewhere I didn’t know about, but that does not appear to be the case. Looks like I have a freeze switch to check and a high pressure switch to check. Do you happen to have diagram that shows where these are? Looks like the High Pressure Switch is B9 and the Freeze switch is B10. Thank you!

 

[mg2361]

B9 is just behind the HVAC unit, in the engine compartment, left side of the machine. B10 is next to the blower motor in the blower box. Check your messages.

 

[Makers Acres]

B9 is just behind the HVAC unit, in the engine compartment, left side of the machine. B10 is next to the blower motor in the blower box. Check your messages.

Once again, you are awesome!!! Thank you so much!