Combines M2 electro hydraulics problems

what year modelIJ, possibly auto Header height control or short in wiring harness. You will have to look in the harness digram printout and back all the way to the cab. There are diodes in some early harness that could be the probllem. My guess is stil in the AHHC system - bad ground and possible moisture in the plug in base.

My guess is that it is a 1978. Serial number is 19065.

It's a 1978. 1979 madels started with 19901.

I had something similar, I had no lift up or down one time. Tried chasing it down, then tried unloading auger swing and that didn't work either. It ended up being a broken wire at the master solenoid. looked good but was bad. Repaired wire and everything worked great.