My turn. Possible ignition sources. alternator, starter motor, spark plugs and wires, opening door and light turning on, under hood light(checking under hood),
static electricity getting in and out, cracked brake light lens, missing or cracked license plate light, electric windows and electric door locks. Electrical short. Electric brakes on trailer, RV frig, auto start water heater. And many more. These are just possible but not likely ignition sources. Anything is possible. I'm going to to be stop now my popcorn is ready.
