My 1998 PLYMOUTH VOYAGER VAN is having trouble with the windshield wiper. When I try to activate the wipers sometimes they work sometimes they do not work in any position intermittent, fast or slow. Sometimes they work on their on and then they stop on their on. The one thing that does not have problems so far is the water sprayer. When I push the sprayer the blades seem to always work.

wher do I start.

Thanks