Wipers only work on high setting?

There are four fuses that run the system, please check them all here is a guide to help with the wiper wiring diagrams in the images below so you can see which fuses to test, and I have included a guide to help test for power with the system and key on.

https://www.2carpros.com/articles/how-to-check-a-car-fuse

If the fuses are okay, we need to scan the CAN, you can get a CAN scanner (Controller Area Network) which will work on most cars from Amazon.

Here is a video to show you how:

https://youtu.be/u-4syLc-ifQ

and

https://www.2carpros.com/articles/can-scan-controller-area-network-easy

You may have a BCM that is going out. Check out the images (below). Please let us know what happens.

The fourth fuse is on the BCM #13 - 7.5 amp. Here is the location in the images below if the fuse is okay, I believe that the left wiper motor is not working correctly. The instructions show how to replace the BCM as well. A CAN scan would help as well. You can get a preprogrammed unit by searching Google or Ebay.