Suzuki intruder 800. Dead. Started bike, ran briefly. Died. Now no power to lights, starter, nothing. I checked the fuses at the relay, checked battery charge. Its good.

When you say "the fuses at the relay", I'm taking that to mean the system fuses located behind the left crankcase cover just aft of the coolant reservior. Have you checked the main 30 amp fuse located under the saddle? There should be two 30 amp fuses under the saddle; one is a spare, the other is active. If the main fuse blows out, nothing will work.