5 years on H3. I clean drains twice a year. Everything is fine!

 

Turns out my drain tube wasn't clogged, but just dangling open behind the glovebox.
I pulled the panel and found the BCM and all connectors soaked... Took out the BCM and dried it out. Took a hair dryer to the wire connections too.
Put it back in and the only light that comes on when I turn the key is the check engine light.
Car won't turn even attempt to crank (with a full battery) and the key is stuck in the ignition again.

 

Resting battery voltage is at 12.9V

 

Did you disconnect battery before BCM disconnect? If not, disconnect battery, key in ignition, all doors closed, for at least 30minutes.

 

Yep, disconnected the battery before removing the BCM. Then left the battery disconnected overnight with the key in ignition and all doors closed.

 

Signal loss from the BCM connector/contacts.

 

Kind of like drying out a cell phone that went through the wash. A few time they might work normally after that, but not likely.