How to check when the car wipers are not working

pu1. It's possible that Hughes went out

2017-12-27

OK

pu2. There's a wiper motor on the wiper part, but I think there's a malfunction in that part

2017-12-27

OK

pu3. If you operate the wipers, the motor makes a working sound, but if the wipers don't move, the screw that connects the motor and the wipers becomes loose. In that case, tighten the screws

2017-12-27

OK

pu4. Most of them are hard to repair by themselves unless you tighten the screws. It's best to check it out at the repair shop

2017-12-27

OK