300 tdi windows all packed up

As above. Started with the back ones and then moved to the front. Initially seemed to sort itself out after the car had been on the move, as if being in the hot sun caused something to pack in.

Found a window 30A fuse broken (not blown), now replaced. Pulled out the window ECU and found the usual dry joint, now soldered up.

12v getting to the ECU on the power in side but nothing out. There's a wire from the MFU, could this be it?

Any ideas chaps?

ETA didn't notice the rear wipe had packed up too. Had a feel round the backof the fuse box/MFU and they've started working. Rear wiper still u/s so if anyone has an AMR 5360 type MFU going spare please drop me a line.

ta.