A vehicle door latch includes a pair of electrical contacts (20, 21) for actuating e.g. a courtesy light and/or warning lights to show that a door is not properly closed. A pivotally mounted bolt (15) of the latch mounts freely rotatable metal sleeve (19) on a pin (18), the sleeve passing between the contacts to complete the circuit and its rotation providing a wiping action to ensure good contact. Preferably the circuit is only completed when the bolt is not at the fully latched position at which the door is properly closed.