4Runner / Surf Rear window

Just after a little help here.
Spent last week down at Beachport and had a blast.
Anyway the day before I had to pack I could not roll down my rear window with either the key or the switch inside. Well what a predicament out camping with next to no tools and the rear window will not open and I also have a Milford cargo Barrier.
What to do?? I managed to cut up my arm getting the cargo barrier out from the rear seats. with the cargo barrier removed I was able to pull the rear door apart and wind the window down with jumper cables and small piece of wire attach directly to the power window motor (sigh). at least now I can open the back up to pack my bleep and get home.
Anyway to cut a long story short the window will go up but not down with the key or switch. I can hear the relays ticking but no power is getting to the motor.
I currently have a piece of wire that is sticking out the tailgate that I need to connect up to the battery to get the windows to go up or down, just reverse the polarity.

Has anyone else had this problem? do I need to replace the control box or is there some other solution??

Cheers for any advice