What would cause wipers to just stop working?

have you got your handbook ? it will tell you there if not its in the engine bay fuse box i think?

Start by checking the fuses And relay. see if the wiper motor is getting voltage. It may be the wiper motor itself

Check fuses with ohmmeter/multi-meter , sometimes they look good but are not.

No idea. Maybe it is telling you to STOP replacing the fuse. Just kidding as I would have to look into it but not working at the shop today as it is Sunday.

The windshield wiper circuit has an circuit breaker in it, under heavy load this breaker trips to protect the wiper motor, when the motor cools, the breaker resets automatically restoring proper wiper action.

Tried pulling the fuse for the washer fluid? Sounds like the wiper motor is failing or it doesn't have a good connection. Disconnect the battery at night to ensure you'll have enough power to crank it in the morning.

My 98 suburban did the same thing (has intermittent wipers I assume) I had to replace the wiper motor. AutoZone had a rebuilt one for $50. ($279 at dealer for a new one)

If the wipers were buried under snow/ice or frozen to the windshield, you may have blown the red 10 amp fuse located in cavity 9 in the fuse block located on the bottom left side of the instrument panel near the parking brake pedal.
In order of easiest to check:
1) ensure wipers not frozen to windshield.
2) ensure wiper arms are not loose on the pivot stud,
3) check the red 10 amp fuse.
You stated that "you can hear the motor". Which motor do you hear? The engine or the wiper motor?
If you hear the wiper motor, then the fuse is alright. Try 1) and 2) above.
PT Stanley

If the fuse blows as soon as you put it in and the wipers are off then you have a short between the fuse block and the wiper switch.

If the fuse blows only when you turn the wipers on then more than likely the wiper motor has shorted and burned out. This one is very likely if the snow storm was heavy and you was driving in it. Cause- Moving large amounts of snow and ice off the window puts a heavy load on the wiper motors.

sounds like the motors burnt out due to the excess friction on the windshield