How do you change a low beam passenger's side headlight on a 1987 Buick Electra Park Avenue?
There is a screw on the front support holding the coolant reservoir in place. Remove the screw, and use pliers to remove the return hose from the radiator cap. Take the coolant return reservoir out (may be tight due to the battery location, if you cannot remove it, removal of the battery will be necessary) and set it aside. Reach inside the hole, remove the plug from the back of the 9004 bulb, and there will be a plastic ring around the bulb housing, twist it counterclockwise and remove it. Pull the burned out bulb, and replace it with the new bulb. Repeat the steps to reassemble.