The second was the 20 amp screw in fuse that handles all the ceiling fans and the master bedroom / bath in my 50 year old home.
Replacing the fuse causes a violent pop.
I tried to turn everything off, but fans (hunter originals) are difficult to tell if they're off or not.
I have a digital multimeter and it shows 120V across the fuse contacts.
I plan to unwire each ceiling fan, see if the fuse still blows and, if not, reconnect them one at a time.
My question - any other steps I should take to diagnose this problem?