Testing L-PAD, Crossover and Horn on Schroeder 1215L?

[Marley's Ghost]

My Schroeder 1215L starting buzzing recently (only certain notes at loud volumes), and I noticed the horn didn't seem to be working anymore. I took the cabinet apart and checked the speakers with the press and 9V battery tests, they seem ok.According to my Fluke, the horn tests at 8ohms, so ok there? I contacted Jorg and he suggested I test the L-Pad and crossover. Any suggestions on how to tell if either is blown?

[will33]

You can't really test crossovers without more specialized equipment. You could just look at the coil to see it isn't burned and check continuity/resistance and compare it with the original part spec if you can even find out what it is. A meter won't tell you anything about a capacitor.

The L-pad should read 8ohms or close to it throughout the range of the dial.