Wipers, four wheel drive and interior light stop working after driving in the rain?

Assuming these are all related, the only thing that makes sense would be the GEM or generic electric module.

Basically this module is there to control the various different electrical systems.

Each of these systems are controlled by the GEM so if it were me, I would remove and inspect it for corrosion. However, once removed I would just replace it.

If you want to test the module to find out if there is an issue you can check the circuits for voltage coming out of the GEM when you turn the systems on. I suspect you will find this is the issue.

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

Please run through this and let us know if you have questions. Thanks

Yes. That is exactly what is happening. If it is not the GEM itself which many not be a visible failure, it is a circuit issue coming off of the GEM.

However, there are no circuits that all these system have in common coming out of the GEM which is why I suspect that is the issue. Basically when it is raining the humidity is high and it can cause issues.

The only way to fix this is to test it when it fails. So we need to wait until it rains and test it. Or start the vehicle turn the wipers on and start spraying the vehicle down with water.

This includes the undercarriage and wheel well areas to try and find when the wipers shut off.

Let me know if you have questions on this. Thanks