Hi,
I have enabled https on my site yesterday and all went fine. My host provider installed it on my server. I tried to reach my site via https and it worked...so what i did is enabled in Jommla->global configuration->server->force ssl and set it to Entire site.
Please NOTE: Do not enable it if ssl is not properly configured on your server or after turning it on, you wont reach your site and you will have change settings via config.php file!!
I also had to fix some links who had http....or browser would give error like: some of the unsecure content has been hidden...but it is not hikashop related just my customization...
All works fine now.
Hope that helps.
Thanks