Somewhat-Reticent There’s also the topic of “this just isn’t needed to be done”. In the last 4 cars I’ve owned in my household, 2011, 2015, 2020, and 2022 model years - the first 3 of which all have already gone close to or over 300,000km (nearly 200,000 miles) and our 2022 (which is around 200,000km/120,000mi) - have never ONCE needed any work on their wiring. Wiring repairs just aren’t a thing in modern cars like they were 20, 30, or 40 years ago. The harnesses are well built, weather sealed, fully connectorized, and they just aren’t a “thing” you work on. My cars in the 80’s and 90’s, by the time I was done with them (most lucky to make it 100,000 miles) I was replacing battery cables, fixing wiring to the tail lights and turn signals, gas tank sending units, etc…
All of my modern cars have come with pre-wired connectors for trailer harnesses, infotainment systems in the dash that preclude “swapping out” your head unit, and everything else in them just lasted for the life of the car. Repairs on them were strictly mechanical - suspension, belts, brakes, swap an alternator, put in a new battery, etc - no electrical/wiring work ever done. That would mean the vast majority of car if built with CCA or AL wire in standard wiring harnesses with the proper crimps, connectors, boots, IP rating, etc will also never need someone to re-crimp or solder or repair it over its lifetime, and the few that do, given today’s auto repair world, will likely just be a “swap the bad section of the harness” event.