UKPassats

I have just installed b5 leather into my b5.5 and wired all the heated part of the seats in. I have discovered that the drivers one dont work. Everything pointed at the seat elements so i remove the seat, seat covers and checked the elements. it appears that the element in the central base part is not working.. Is this down to the element or is there anything else in there that fails. They are completely stitched so i can see a lot.

Thanks in advance