Classic/Antique Car Repair: Flasher Switch, metal cylinder, steering wheel

Question
QUESTION: How do I replace the (indicator) flasher switch on a 1962 T-Bird? It seems to only work intermittently.
Thanks!

ANSWER: Which flasher, the 4 ways or the directionals?

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QUESTION:  I'm concerned about the directionals (left/right indicators)
Cheers,
Les

Answer
The flasher itself would be the first thing that I would consider as the problem not the switch up under the steering wheel. The flasher is located under the dash and is a round metal cylinder with two wires coming from it. It is just a plug in.
Brad