Round 5 on the killer Metrahit. Now latching relays can trip into states where high AC voltages measure as safe, giving operator a false reading of safety. Admittedly, a tape eraser emits a very strong field, but one wonders if this could be a killer meter after a side impact with enough G's to trip it the same way?
Edit: Those mixed-up terminals remind me of older idiot-style Volkswagen side mirror controls... while industry had accepted a joystick-style standard since the 70's, these guys used a dumb slide/rotary switch perpendicular mounted on the door (if you've used one, you'd remember it).
Another posted with a simple magnet..
An even smaller magnet (with proximity shown) what a piece of junk!