How do you change a relay in a 1999 Cadillac Eldorado?

To change a relay in a 1999 Cadillac Eldorado, first locate the relay box, typically found under the hood or in the engine compartment. Identify the specific relay you need to replace by consulting the diagram on the relay cover. Use a pair of pliers to gently pull the faulty relay out and insert the new one in its place, ensuring it's seated properly. Finally, test the system to confirm the new relay is functioning correctly.