Headlight warning chime

Folks used to do this "back in the day" when the little ceramic "sonalert" and other inexpensive noise / beeper modules began to appear, import, inexpensive. Just wire the thing with an isolation diode to the key "run" line and to the park/ tail light circuit. The diode will prevent the ignition power from activating the alarm, and when the key is off, the loads on the run line act like a ground for the beeper with power coming from the lighting circuit. Basically, tail light power is what you want as it is no "no matter what" unless switch is off

If you ever end up in CDA give me a buzz and "we'll do lunch"