To remove an instrument panel bulb you just turn the black socket/cap behind it about 1/4 turn and the "socket" and bulb come out together. If you have small hands. long arms, and a lot of patience, most of the bulb/socket assemblies can be removed by reaching up behind the panel while laying on the floor.
A little more explanation:
Each black socket has a metal strip around the inner edge that is flat up against the instrument panel circuit board, and there are also two bulb contacts inside the socket.
- When you insert a bulb into the socket it connects with the two metal clips/contacts inside.
- Those clips/contacts are connected to the metal strips on the edge of the socket.
- When you put the socket back into the cluster and turn it about 1/4 turn, the metal strips on the socket contact the circuit board and connect to power and ground. The flat metal contacts can get tarnished or corroded and not make a good connection.
Bruce