Anyone know if maybe a blowout highbeam on one side would mean no highbeams at all, on a Road Glide?

 

They are independent. If you lose a high beam, the other one still works.

 

I don't ride much at night. Maybe there both burned out!
Hopefully, that's the case.
Otherwise, I don't really know where to look?

 

Anybody?

 

start by testing the bulbs...test the headlight connectors for power in the high beam position.

change your bars maybe ? a pinched or pulled off wire etc.

It's gonna take a little logic to work through the circuits and find the fault

I don;t know about Ont. but in many US States it is legal to use Highs in the daytime- better visibility ( maybe) and evens out the wear on the bulbs

mike