> current won't flow through your hand Of course not, I didn't mean to imply that. > if the ring itself touches [the car frame] That's what I meant. > 12V i

> current won't flow through your hand Of course not, I didn't mean to imply that. > if the ring itself touches [the car frame] That's what I meant. > 12V is too low to pass your skin with a significant current Now of course the human body has a complex impedance, with cell membranes acting as capacitors: higher frequencies let more current flow. And that also depends on how much skin there is (single finger vs arm to foot), if it is wet, etc. I remember trying a (discharged) 9 V battery on my tongue as a kid... that was literally quite a shock, even with continuous current. In the end, I wouldn't bet that an electrocution is impossible using a mere 12V of electric potential.