It would depend on what is wrong with them and what vehicle you have.
how do you fix timing on wipers 2000 buick regal
Windshield wipers don't have fuses
change them
You fix them to the wiper arms usually a snap fit
First you have to diagnose what the problem is before you can fix it.
The worm gear that runs it is stripped, Replace the motor.
i put a new windshield wiper moter in and the fuses are fine but my wipers still wont work
junk it
You have to remove the linkage from the wiper motor.
u go and buy a new pair and replace them with the old
Wiper motor cogs can wear down and fail to leave the wipers in the lowest position. If the wipers had encountered some resistance they can also slip. It could just be a simple fix.
replace them with a better set