All lights flash

More than likely this is the central timer module.

I am attaching the testing for the CTM below but basically I have seen a number of different failures with this that this issue is most likely the CTM.

Here is a guide that will help with testing this module as shown below:

https://www.2carpros.com/articles/how-to-check-wiring

I am attaching the info below on how to test the module and the wiring diagrams. As you will see the park lights and wipers are run through the CTM so that is the likely common issue.

Also, I attached the process to replace it. Please run through this info and let us know what questions you have.

Thanks