Is there a wiper motor relay?

Hello there,

Here is the location and the wiper wiring diagrams so you can do some testing.

there is also a rain sensing unit that could be causing the trouble as well.

Here is a guide to help test the relay which is under the passengers seat.

https://www.2carpros.com/articles/how-to-check-an-electrical-relay-and-wiring-control-circuit

Please let me know if you need anything else to get the problem fixed.

Best, Ken