I know this makes me sound stupid, but there is a chime that lets me know if the key is in the ignition or if the headlights are on. I want to disable the interlock if that is possible. My husband the motorhead and electrician thinks that it is not possible, which may be accurate. Before I replaced the battery, when it was really cold out we had to jumpstart the car because the battery had enough to light the headlights but not simultaneously run the starter. Once you turned on the headlights to start the car, you couldn’t start it anyway.