Interior lights flickering only when driving

Lights that flicker specifically while driving (not when parked on shore power or battery) usually point to a loose ground connection somewhere in the chassis-to-coach wiring, made worse by road vibration. Start at the main ground strap between chassis and coach — that's the highest-traffic connection and the first thing to check. If only one fixture flickers, it's isolated to that circuit; if it's rig-wide, it's a main power or ground issue. Is it every light or just certain ones?