Before Mrs. Wally became Mrs. Wally, we were sitting in my '51 Chevy Deluxe watching the submarine races. The lighter started smoking and glowing red hot from under the dash. I quickly pulled off the wire and burned my hand. I don't know how that was fused but I have removed the lighter wire from my '48.
Pictures of the '51 are in the link shown in my signature.
Been there done that (except for, that I am pretty sure that it wasn't with "Mrs. Wally before she was Mrs. Wally, nor after she became Mrs. Wally", for that matter.

).
Molten copper leaves a bad mark on the ole mitts.
Carl