I guess you have an S2/3 Fulvia. First, make sure that the wiper motor turns OK by connecting a 12 v source (battery charger) to it. Second, you should remove the two plastic surrounds around the steering column, then undo the slotted nut and you can extract the switch assembly (watch out for the ground lead which may have to be cut and reconnected later with two terminal connnectors). You can check it on the bench: its contacts can be dirty or broken. Many, many years ago (in the 80s I think to recall) the LMC mag run articles on how to check the operation of the light and wipers switches. Andrea.
Many thanks Andrea - Does anybody have a copy of the articles to which Andrea refers? Would be happy to reimburse expenses for printing and postage.
Regards
Tim