Essentially it uses a hall effect sensor to detect a spinning magnet on the crankshaft for timing, and a transistor and battery to fire the spark plugs for ignition. Once he got his circuit up and ...

Investigators are considering an array of possible ignition sources for the huge fires that have killed at least 24 people ...

those are signs that an ignition switch has failed or there’s a problem with the wiring from the switch to the starter or other electrical components. Those could also be signs of other problems ...