I'm trying to figure out whether the delay relay is busted or it's the wiper motor that's packed up on my '02.

I've only recently bought it so I have to go on what was told to me by the previous owner:

according to the previous owner apparently the wipers work "sometimes", which i haven't seen happen yet, but the wash spray works fine.

what should I be looking for to figure out what needs fixing/replacing?
thanks for your help!

warren