Well I can tell you. After Hurricane Harvey. Insurance companies were totalling out all flooded Vehicles, this time around. They're not going to mess with electrical Gremlins anymore. If the carpet even got wet, it was an automatic total. So whatever you do don't file an insurance claim.
My opinion is,some of your problems may continue to get worse over time.
But if you're determined to keep driving what you have.Maybe you can live with some of the lights? I personally don't want an airbag to deploy in my face without me expecting it. You should keep that in the back of your mind every time you get the driver seat.
Aside from that, pull all the carpet and seats out. You'll need to spray the metal floor board with some sort of enzyme to kill the bacteria.
Obviously pressure wash and soap the carpet. Separate the padding from the carpet if possible. If your model has padding that's glued to the carpet, and it's rubber foam molded. Throw the whole thing away and buy new. If the padding separates from the carpet, you can pressure wash and soap the carpet. Keep the carpet and just replace the padding.
You need to buy 2 or 3 cans of high quality contact cleaner. Spray that material on every single electrical plug, fuse panel and seat motors if they got wet. Make sure you unplug every connection and spray inside there too. If your airbag light is ever on, and stays on, while your car is running. That means you have no airbag system that is operational. But because everything got wet. That doesn't mean that it won't deploy. If your airbag light never comes on then you might be alright.
I don't know how many electrical modules got wet. Because your pictures don't tell the whole story. But you can buy and replace as many modules as you can afford. Most importantly. Make sure you
de-energize everything,before you spray it down.
Hopefully this vehicle is not your daily driver.
Here's a couple of pictures of what you might need to buy.
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