3520 John Deere wont move forward or reverse

[snoopygarcia792]

Hope someone has come across this problem and can help me. I have a John Deere 3520H 2005 model no cab tractor that is Hydrostat transmission. The tractor will not move forward or reverse. I canmove the shift lever to A, B and C positions with a slight detent. Check the seat, break switches all good. No Codes? With the machine off. I Pulled the X27 connector that goes to the forward and reverse solenoids, both had a resistance of 4 ohms. When the machine and either forward or reverse is pressed I get 0 to 3.8 vdc. So it looks like the pedal circuit is working. I tried getting the raw data using the display but my model doesn稚 seem to work. I am truly lost.PLEASE HELP?ust a side note the loader and PTO work fine? Can anyone tell me what voltage the forward/reverse solenoids operate at is it a square wave or just a dc voltage. What痴 suppose come out of the A2 electronic drive controller for these solenoids?

Thanks in advance SG792..

 

[pmsmechanic]

Check the seat safety switch.

 

[joecdeere]

I have a PDF of the Tech manual you're more than welcome to
If wanted, shoot me your email

Joe

 

[snoopygarcia792]

Check the seat safety switch.

Thanks,I did. The seat and break switches are working .I even made jumpers to eliminate them.

 

[snoopygarcia792]

Thank you.I purchased the TM2137 and TM2138 service Manuals.They don't give you the fine details on the solenoids or the drive module that I need for further testing.