How do you change headlight bulb on 1993 jaguar xjs?

To change the headlight bulb on a 1993 Jaguar XJS, first, ensure the vehicle is turned off and the keys are removed. Open the hood and locate the back of the headlight assembly; you may need to remove the cover or twist the retaining ring to access the bulb. Carefully disconnect the old bulb from the socket, replace it with a new bulb, and ensure it is securely fastened. Finally, reassemble any covers or retaining rings and test the new headlight to ensure it's functioning properly.