Just over a month ago when I was buying my 1982 KZ550A, the PO tested the hazard lights, and they didn't turn on. He must have left the switch on, because while I was taking it for a test ride, the hazard lights came to life - so I turned off the switch and kept riding. I've used the hazards a few times since then with no problems. However, they recently stopped working completely. The turn signals and running lights still work, so I know its not the bulbs.
I've read through a couple other threads where people had similar problems, so I tried some of their suggestions, which included checking the voltage at the hazard relay to see if it was close to battery voltage. I'm a noob when it comes to electronics, so I could be using the multimeter wrong -- I'll try to be as clear as possible about what I did so you can let me know if I made any mistakes. I'll attach pictures of my multimeter and wiring diagrams as well -- although the black and white diagram from my Clymer manual may be incorrect. It says the hazard relay wires are red/green, while the color diagram I found online shows them as orange/green.
I began by testing the voltage of my battery with the multimeter on the 12V setting, and it measured about 12.5V. I then located the hazard relay beneath the right-side cover of the bike. With the ignition on and the hazard switch turned off, I set my multimeter to "10 MegOhm input DCV." I held the black lead against the silver part of the engine (pictured) and touched the red lead against the connector at the end of the orange/green wires at the relay (pictured). Both wires gave a reading of 11.3V, which seems pretty close to battery voltage. Then I tested the voltage again with the hazard switch in the "on" position. The wire on the left maintained a reading of 11.3V, while the wire on the right gave a lower reading of 6.9V. Does this mean I need a new relay? Like I said, I don't know much about electronics, so I don't really know what I'm doing.
I don't use the hazards much, but I'm worried that my bike won't pass inspection without them, so I'd like to get them working. Any input would be greatly appreciated!