Rear Wiper Relay ?

Hi all
I`ve recently bought a lovely `93 200tdi with very low mileage, but i can`t find a manual that lets me know if there`s a relay for the rear wiper, or if its a switch starticht to motor.... It`s not working at the moment and i`d like to try this before i have to get below the rather immaculate headlining. Looked at the fuse, and its fine....
oh, there`s a pump noise coming through, but no movement in the wiper arm..and i can move it freely by hand, if that helps.....
err... help !?
many thanks
Jim

Right hand foot panel, top row, I think. I don't think PRC9957 exists any more and there is a new part number.

also check the wires in back door going to motor, i had this on mine, had a fiddle and it started working

Thanks chaps....i can have a wee look on saturday when its daylight and im not working. Keep yer fingers crossed !
All the best..jim

Hello..me again !
Will the rear wiperwork when the upper or lower tailgate is open ?
Also..do you if its the wiring for the glass or lower tailgate?
Cheers again.. Jim