I had a problem with a WCF service that was having problems on a secure page using SSL. The error said the endpoint could not be found. I found some resources on making a service HTTPS ready, but not for both. I finally figured it out that I need two endpoints pointing to the same service. One endpoing contained another property called "bindingConfiguration" that maps a binding that has a mode of transport which enables an endpoint for https. The bolded text below is what you need to enable a service for HTTPS.
<endpoint binding="webHttpBinding" contract="IWebService" behaviorConfiguration="WebServicesBehavior"/>
<endpoint binding="webHttpBinding" bindingConfiguration="webBinding" contract="IWebService" behaviorConfiguration="WebServicesBehavior"/>