This, I went to school 2 years for heavy duty ag diesel, there's more wires in new tractors than cars, everything is controlled electronically now, even the 18 speed hydraulic transmissions, although I work on mostly trailers for a fleet, the electrical knowledge i have is worth it just because I can troubleshoot the systems without back probing wires, and hacking the 50ft wirelooms of 100 wires where 50 are black and 50 are white in the trucks, def, egr, dpf, they have to hold classes monthly because these change quickly, you can't just get a job in any shop anymore and be trained by the lead tech, there's so much stuff to learn that they will pick a degree over a diploma, because it's alot less training, my degree got me in my work over guys with 5 years experience, because they have been out of the field longer than a year, and the stuff they knew was already outdated
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