@roymontano ,Roy v.Montano , Remove the light fixture housing from the fan, then unscrew the screws where the light fixture attaches to the fan assembly(trim cover). Switch where the pull chain attaches should now be visible and can be removed. Install the new switch with the pull chain through the housing and tighten the connection. See links below for detailed instruction on ceiling fan switch replacement.
Pretty much any hardware/big box store should have a replacement switch for ceiling fans. Good luck. I hope this helped you out, if so let me know by pressing the helpful button.
http://removeandreplace.com/2014/05/06/how-to-fix-a-ceiling-fan-light-switch-pull-chain/
http://www.wikihow.com/Replace-a-Ceiling-Fan-Pull-Chain-Switch
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