It's great you've the original windshield, this reduces possible of water entry from under/around it. Next check your sunroof drains.
If issue comes with rain or washing, then goes away once dried out for a few days. Than it's moisture related!
Keep in mind this is only one possible cause of your issue. When I hear problem(s) coming and going, I first look to moisture!
It's fine too wash around wipers & windshield. But if windshield has ever been replaced, chances are the installer did a poor jobs. Openings around windshield allowing...
Seems we could have numerous causes of "Squealing"
alam indicating low fluid. Top fluid, watch for indication of leak.
Air in the Master assembly (master, ABS unit, booster pump, accumulator). Bleed, Activate ABS/booster w/SST electronically or manually, bleed. Note it is possible that manually...
Squealing (alarm) with absent of dash lights could be a booster accumulator not centered. But you've reported dash lights in past post so I assume same now.
With no real issue with braking other than it's shutting down ABS (dash lights on) and engine running fine.
It seems to leave two...