1974 Seat Belt Interlock Video

Fascinating. Thanks for posting that.

I always thought that for my car the key had to be on before pressing the override button. Might be accurate since it is a different switch than was shown, but might have been an assumption on my part.

Mine is completely gone now though. I think I left the override in the engine bay for looks, but I gutted the rest of it and used some of the wires for a late model chime with a headlight warning and key in when engine is off warning. If there are wires left, they don't go anywhere.