OLD Light Switch with Dimming. Dimming nob failed. 3 Black Cables into the Loop Terminal 2 Red Cables into the 1 Terminal 1 Red Cables into the 2 Terminal 2 Red Cables from 1 Terminal in Old Switch moved to 1 Terminal in new Switch 1 Red Cable from 2 Terminal in Old Switch moved to C Terminal in new Switch 3 Black Cable s from Loop Terminal in Old Switch moved to Loop Terminal in new Switch