You probably have shorted wires inside the combo switch. The assembly will need to be replaced.
It is under the black plastic trim plate under the windshield wipers.
Wipers normally use a breaker, not a fuse.
Changing fuses is not a hard task. Make sure the car is off, disconnect the battery if need be, remove the correct fuse, and push a new fuse in its place.
Bad turn signal switch probably.
Windshield wipers don't work
The front wiper arms on a 1997 Mercury Villager clip off once they are bent backwards. To install the new wipers simply slide them into the clip.
My wipers come on when the turn signal is used - Ford recommends replacing a revised mulifunction switch (turn signal switch)
Because they broke yo!
Why are there windshield wipers inside the car?
Replace the windshield wipers.
Mary Anderson invented windshield wipers in 1903.
When purchasing windshield wipers that work intermittently, they can be any windshield wipers that are the correct size. The ability to work intermittently is a wiring/fuse ordeal. This does not play a part in the selection of windshield wipers that you choose from.