Originally Posted by Yellow650Loz

I think there's a few here mistaking voltage for current.

If the voltage drops then the current draw will be higher.



I.e.



55w @ 12V DC = 4.583 Amps

That's basically one headlamp bulb on a battery and engine off



55w @ 14.9V DC = 3.691 Amps

That's the same bulb but this time the battery is charging....the engine is running.



It's the current that overheats wiring and connectors, not voltage.

Now it could have been a corroded connector that's caused voltage drop and so the current draw has increased. However, I would be cautious as to why it melted in the first place, jump starting a motorcycle from a car is fine. Running or otherwise.



Please don't ever try jump starting a car from a motorcycle though!!!!!