It only happened in the rain and now it's intermittent and getting worse. We first noticed it with the brake pedal activating the rear view camera. Then we got pulled over for weird light flickering.

I found water in the hatch lights so i it was that. And then i was told it could be a light bulb filament issue. Then someone else said it could be a hack job by the previous owners' autostart installer.

I started by replacing the light housing in the hatch with brand new ones. That didn't help. Then i replaced all the bulbs with leds... I then examined the wiring that was easily accessible by the pedals and under the floor panels near the doors and behind the panel on the hatch and didn't see anything obvious. I'm out of ideas...