[38 coupe]

I suspect three bad switches, and will be very interested in what the final investigation reports.
I purchased ten new pressure switches about four years ago. My 53 seems to have a switch fail about every two years. I'm not willing to cut into my new wiring to install a mechanical switch when the pressure switch is so easy for me to replace (Ford put the whole mess under the hood starting in 1952, way easier to work on than 1940 through 1951). Between replacing switches on my car and helping other people with failed switches on tours I am down to three spare switches.