finally my washer jets work
after taking off the batery cover to show the T-piece that connects the two hoses from the jets, i disconnected the T-piece.
Seems that the T-piece filter was blocked as i blasted it with hot water and all holes were flowing freely. I then re-connected the T-piece to all three hoses and hey presto the jets worked again
Thanks for everyone's input on this topic and if anybody else finds their washer jets dont work then its a great idea to follow the parts diagram which rlbccb has posted below.
many thanks,
Lee