Autotronic 3 and datatronic 2 problem.

[Zaharia Victor]

Hello, I am having some problems on a 6180 Massey Ferguson with the autotronic 3 gearbox control unit. I was transporting some bales in gears 1-A and at some point the tractor jumps forward and the lights on the dash corresponding to the transmission turned off. I've noticed that the 3 point hitch control box as well as the Datatronic on the side pillar do not function, leading me to belive there is no power going to them or the gearbox control unit. The fuses next to the air filter seems to be good, but there is something strange. The yellow (20A) and red (7.5A) wired fuses have a constant 12V on them with the engine running or not, but the pink wired fuse (5A) has no power to it whatsoever. Traced the wire from the fuse back to the cab and found nothing. Dose anybody know what should I check next?