The only stupid question is the one not asked, right?
I have a ’65 Coronet 440 the right turn signal and brake light stopped working. Normal tail light is ok. I am thinking the flasher went bad. Any other thoughts?

My questions are –

1 – Is it in the wiring harness or on the back of the dash/gauge cluster?
2 – How many is there, 1 or 2?
3 – Anybody have a source before I start searching around?

Thanks, for any help.