A faint click is followed by part or all of your electrical conking out?

[chopper]

Most Harleys from 1965 on have circuit breakers installed to protect the electrical system. A circuit breaker is a reusable fuse that will cut off the source of the juice if the wires get "hot". Earlier Hogs used a fuse that would have to be replaced if blown. The late Sixties and early Seventies bikes used only 1 circuit breaker attached to and interrupting the main positive feed from the positive terminal on the battery. On these models the whole system shuts down if there is a short in the wiring. Later models utilized 3 breakers, then 4 and even more with the FLT series that use radios and other accessories. These multi circuit breakers protect individual segments of your system such as the lighting, ignition and accessories. A 30 amp breaker protects the whole system while 15 ampers do the rest.

Say, the ignition stops working but accessories and lights still do. Well the 15 amp ignition breaker has shut off the juice because of a wiring short. When the short cools down the breaker will click again turning the juice back on temporarily until heat forces it to cut out again.

The problem short must be fixed before the circuit breaker will allow uninterrupted service