How do you change the headlight bulbs on a 86 Cadillac Eldorado?

To change the headlight bulbs on a 1986 Cadillac Eldorado, first, open the hood and locate the headlight assembly. Remove the retaining ring or clips that hold the headlight in place, then pull the headlight out gently. Disconnect the wiring harness from the back of the bulb, replace the old bulb with a new one, reconnect the wiring, and reassemble the headlight assembly by securing it with the retaining ring or clips. Finally, test the new bulb to ensure it works properly.