I'm looking for one of the little 12 v testers, clip on one end and pointer/light on the other. i want one that beeps or buzzes also.I was going to make one, parts house don't quite know what to look for as far as beeper/buzzer.I've tried the bay and the zon. Maybe i'm not calling it the right thing. Maybe i'm not asking the part house for the right thing as far as buzzer/beeper goes.I know this is something simple, i'm just not calling it the right thing, or not looking in the right place.I would think just a simple "door ajar" buzzer would work any help?? I'm not the best with searching skills on puter.