My Buss 180 flasher relay failed the other day after maybe 50 cycles in 10 years. Opened it up out of curiosity and found the tiny, hair like, heater wire broken.
Replaced it with an electronic flasher from Superbrightled.com. I tested the new flasher with the original incandescent bulbs and worked like a charm.
Then replaced the 1157 incandescents with LED replacements bulbs.
Driver side is LED, passenger side 1157 incandescent