How to repair automotive computers class 1

So this is Class 1, just a basic approach for all of you to see the tools need it and to start with some basic testing. Please let me know in the comments how you like or not the content. I hope the audio and video quality are good.
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Links for terminals, wire. Arduino starter and 4mm banana

Square terminal:

https://www.amazon.com/gp/aw/d/B01N99...

Round terminal:

https://www.amazon.com/gp/aw/d/B07JQS...

Heat Shrink:


https://www.amazon.com/gp/aw/d/B07DFG...

Round terminal Delphi:


https://www.amazon.com/gp/aw/d/B07K43...

Arduino Starter:


https://www.amazon.com/gp/aw/d/B01D8K...

16 ga red/black roll wire:


https://www.amazon.com/gp/aw/d/B07584...

Stackable 4mm banana:


https://www.amazon.com/gp/aw/d/B07QPP...

Amscope trinocular Microscope:


https://www.amazon.com/AmScope-SM-4TZ...

Regulated power supply:


https://www.amazon.com/Siglent-Techno...

ECM simulator:


https://www.ebay.com/itm/MST-9000-Aut...