This just started.... or at least I just noticed it. With the headlights on dim and engine warmed up and idling, the brightness cycles from normal to slightly dim. Cycle time is around a second. When I rev the engine slightly, they return to normal steady brightness.

When running with or without lights, the ammeter is just right of center, slightly charging, in the normal position.

I don't suspect a connection -- within the last 2 months, I removed and cleaned all the battery connections, including regulator and other parts when I was fixing a grounding issue.

Battery cranks start just fine. No other indications of failing battery.

Thanks folks,

Snuffy