My windshield wipers suddenly quit working.

It could be the screws are loose (at the bottom end of the wipers)
There may be a rubber cap you will need to access the screws. (Also worth checking if the wiper motor is working when wipers are not)

Other possibility, the wiper motor fuse is loose with intermittent connection - locate the fuse box and take out all fuses, inspect them for damage/burn marks and insert them firmly back.

Hope this helps

If your not familiar with automotive electronics an module control of components , I suggest you take it to the dealer . They have the tools to diagnose this type problem !
The Wiper/Washer System consists of the following components:
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Windshield wiper/washer switch

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Body control module (BCM)

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Wiper PCB relay

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Wiper high PCB relay

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Windshield wiper motor

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Windshield washer fluid pump

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Windshield washer fluid level switch

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WPR fuse 25 A

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WSW fuse 10 A

Low Speed Operation
When the wiper switch is in the low speed position, ground is applied through the switch internal resistor and the wiper switch low signal circuit to the body control module (BCM). In response to this signal, the BCM energizes the WIPER PCB relay by applying battery voltage through the wiper relay control circuit to the coil side of the relay. This allows battery positive voltage from the WPR fuse to flow through the switch input side of the WIPER PCB relay and out to the switch input side of the WIPER HIGH PCB relay. Since the wiper high relay is de-energized and its switch contacts are normally closed to the low speed control circuit of the windshield wiper motor, the motor will operate at low speed.
High Speed Operation When the wiper switch is in the high speed position, ground is applied through the windshield wiper switch high signal circuit to the body control module (BCM) indicating the wiper high speed request. In response to this signal, the BCM then energizes the wiper PCB relay, as stated above, and the wiper high PCB relay by applying ground through the control circuit to the coil side of the relay. With the wiper high relay energized and its switch contacts closed to the high speed control circuit of the wiper motor, the motor will operate at high speed.
Wiper motor high speed operation and the wiper high speed PCB relay can also be commanded ON/OFF by using a scan tool. Refer to Control Module References.
DTC B3715 02: Front Wiper Relay Drive Circuit Short to Ground
DTC B3875 00: Wiper High Speed Relay Circuit
DTC B3922 00: Front Wiper Function Select Circuit
You could Have a switch problem , BCM problem ,PCB relay problem , the pcb relays are non serviceable an the whole under hood fuse box would need to be replaced . Malfunctioning motor bad ground some where etc.....

arm/linkage came loose.. its at the base of the windshield..

If both wipers don't move, could be the switch or the wiper motor.

Check your fuses for any blown ones. If you don't find any blown fuses to replace, you will need to replace the wiper fluid pump.

It sounds like your wiper motor is dying

YOUR WIPER MOTOR COULD HAVE BINDING LINKAGE AND PIVOTS.TRY LUBRICATE THEM WITH WD40.TRY NOT TO GET ANY ON WINDSHIELD.IF THIS DONT WORK WIPER MOTOR COULD BE FAULTY.

it sounds like the ball socket linkage has parted as you should not be able to move the wipers with ease.

Check the wiper motor connection if its touching anything and loose it will automatically ground out and check at connection make sure you put some gel and then snap it in/ Please rate my response thank you very much