Pull light in bathroom broken. Bathroom no window so pitch black. Extractor fan wired in to come on when light is on. Bought new fitting. Undone old fitting and found 3 red wires all wired separate. 2 black wires wired together. New fitting has 3 areas to wire into and 30 year old fitting had four hence previous config. How to config wiring into new style fitting? House in rented put from previous experience this means 2 days off work as they never bring right equipment.
