I’m mad at myself. Allow me to vent.
Problem: intermittent left turn signal, '02 Corolla.
Changed the bulbs, cleaned the socket with contact cleaner, and replaced the flasher… a friend did the physical part, since I’m no longer capable.
My next step was going to be the combination switch… and he tried tapping it and it began working. Wish I’d thought of that. Now we know what needs changing, and that the lever can simply be tapped when it fails to function until we can get a replacement part… But man, am I mad at myself for not trying tapping the lever before my friend went through all the work of replacing that flasher. I feel like such an idiot.
Let that be a lesson to me.