VW Tiguan loss of power steering and engine light on

VW tiguan came to our shop with christmas tree kind of dash lights on. Bunch of trouble codes that are not related to each other. It is very rare for all the modules or sensor to go bad in one night so we started to look for damage, or flood and we found a nest. Rat problems in Toronto is very bad we had a dead baby squirrel, and dead baby rats on top of the transmission. many wires bitten or broken. We carefully repaired wiring harness one by one.