Bosch E23,E24 or E25 dishwasher not working error fix (a detailed tutorial)

There are guides to changing the drain pump on a bosch dishwasher. This is a better guide as it shows tips on how to remove and install the drain pump cover as well as tips on getting to the drain pump and info on reinstallation We need those tips as many YouTube videos make it look too easy and you make errors when you follow a lack of instruction..