I agree that that's the likely problem. I inspected the cap and rotor for graphite, dirt, whatever yesterday but no problems are evident. I took it for a drive and tried to induce the problem to no avail. While driving at various speeds and loads I played with the keys in the ignition but there is no looseness at all. I'll check the wiring to the switch when I feel like performing some Cirque du Soleil maneuvers.
I'll keep looking and if it happens again I'll know for certain it wasn't a fluke.
Last edited by Phak1; 11/30/2023 12:17 PM.