Exactly. And yeah, grounding straps are a real deal, hence why you see fire trucks dragging chains underneath them.Isn't the car engine and electronics surrounded by pretty much a solid steel enclosure (the body) which would act much like a Faraday Cage? If it required an Earth ground to operate effectively, then a simple grounding strap from the frame hanging down to the road surface should work. I know I used to see cars and some trucks back in the day with those 'grounding' straps underneath. Or am I just barking up the wrong tree?
I’ll see if I can find it, but I read a study not long ago that explained how EMPs will actually affect things. It’s not as dramatic or world ending as YouTubers selling views or survival supplies would lead most to believe.