Should you disconnect BOTH battery negative terminals before MIG welding on a truck with a 24v system? - Quora
When you jump a car, it's positive-to-positive between both batteries, and then negative from the good battery to ground. Why doesn't the negative terminal of the bad battery need to be connected
I dropped my wrench on the battery terminal touching both terminals. Do I replace the battery? - Quora
![grounding - Should I ground my radio to the chassis or battery for a mobile install? - Amateur Radio Stack Exchange grounding - Should I ground my radio to the chassis or battery for a mobile install? - Amateur Radio Stack Exchange](https://i.stack.imgur.com/1GDPC.png)