In order to can test and HTTPS WCF service (does't matter the client type: console application, windows application, web application, etc.) you must have installed valid SSL certificates (could be also test certificated generated by you) on both computers: on client PC and on server PC (where your WCF service is installed).
So first you should create the SSL certificates then you should installed in both side, and finally you could test your WCF service. Here is a link that can help you in doing this:
SSL with Self-hosted WCF Service[
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