When is the last time you cleaned any of the electrical connectors on your Healey? Well, that’s too long. To keep the resistance down from poor contact you should clean the connectors and even the fuse block. Corrosion can lead to resistance at a connector and cause fuse failure.
The fuse block shown was lightly glass bead blasted. Other connections can be cleaned with Scotch Brite to provide a good connection. This can make a good winter project.