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As for me, I have utilized the following resources to obtain a better understand of automotive electronics. I hope you find them as useful and helpful as I have.
YouTube - Awesome
- Paul Danner, an ASE L1 certified Master Technician with 20+ years of experience in the field, is an awesome instructor.
- Has incredible amount of free YouTube videos
- (Chapter 2) Engine Performance Diagnostics is a good starting point
- Has a Premium Channel with class level content
- Has an awesome book available