Soon as I saw the round thing I knew it was an iButton: https://en.wikipedia.org/wiki/1-Wire https://en.wikipedia.org/wiki/1-Wire I have seen them on Home Depo

Soon as I saw the round thing I knew it was an iButton: https://en.wikipedia.org/wiki/1-Wire https://en.wikipedia.org/wiki/1-Wire I have seen them on Home Depot forklifts. Lift operators have the iButton key fob to allow the machine to stay operating. Years ago I was with a guy who though the could load our truck himself, started the lift, alarm goes off and it shuts down. Used cars can have all sorts of crap in them from mods or whatever. And who knows what abuse a used car has seen but this car was fleet maintained and GPS monitored so likely a good used car.