Can someone explain to me why they don’t recommend putting car jumper cables on the working battery black terminal to the dead battery black terminal but rather to an unpainted metal surface on the donor car?

Question

Also, how does electricity flow from one car to the other if there isn’t a loop?

In: 26

Answer 1

I’m not sure this is fact, but when I learned about jumping cars it was explained to me that by grounding the negative on the target vehicle, the current reaches critical electrical devices more easily, thus the load requirement to start the target vehicle is reduced.