Ecu & airbags...
Intuitively yes, it does look dodgy
Technically though, there's still only 12v across the batt terminals, even if one side is at 10000v. I guess the risk is if the spark jumps from the "wrong place" eg one of the ECU wires. (would need to have the hood open?)
no?
just theorising anyhow, not gonna go any further with this one obviously
