Sounds like you have a network communication issue or water intrusion in a connector causing electrical issues. Start with pulling codes and then you will simply need to start pulling connectors apart looking for water intrusion on the inside of the connectors.
The wipers staying on is typical when the CAN bus communication is interrupted. The wipers on is a default.
I would start with codes and go from there. Hopefully that will point us in the best direction of a connector or module as the issue.
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Tuesday, February 18th, 2020 AT 3:00 PM