C# – HTTP 415 Cannot process the message because the content type ‘application/json; charset=utf-8’ was not the expected type ‘text/xml; charset=utf-8’

We have a webservice that works fine on HTTPS but shows the HTTP 415 error on HTTPS. So, under HTTP, we can make a POST request sending and receiving JSON without issue. When we try the same under HTTPS we got the error that the service is expecting text/xml insteas of application/json. Any suggestion on where to look?

The server is using a self signed certificate if that matters.

Updated with bindings and behaviors

 <!-- Wcf Services Setting -->
  <system.serviceModel>
    <bindings>
      <wsHttpBinding>
        <binding name="WsHttpBinding" maxReceivedMessageSize="1048576">
          <readerQuotas maxArrayLength="1048576" />
        </binding>
        <binding name="SecureWsHttpBinding" maxReceivedMessageSize="1048576">
          <readerQuotas maxArrayLength="1048576" />
          <security mode="Transport">
            <transport clientCredentialType="None" />
          </security>
        </binding>
      </wsHttpBinding>
      <webHttpBinding>
        <binding name="WebHttpBinding" maxReceivedMessageSize="1048576">
          <readerQuotas maxArrayLength="1048576" />
        </binding>
        <binding name="SecureWebHttpBinding" maxReceivedMessageSize="1048576">
          <readerQuotas maxArrayLength="1048576" />
          <security mode="Transport">
            <transport clientCredentialType="None" />
          </security>
        </binding>
          <binding name="webBinding">
              <security mode="Transport">
              </security>
          </binding>
      </webHttpBinding>
      <basicHttpBinding>
        <binding name="BasicHttpBinding_IMainService" maxReceivedMessageSize="1048576"></binding>
        <binding name="BasicHttpBinding" maxReceivedMessageSize="1048576">
          <readerQuotas maxArrayLength="1048576" />
            <security mode="None">
                <transport clientCredentialType="None" />
            </security>
        </binding>
        <binding name="SecureBasicHttpBinding" maxReceivedMessageSize="1048576">
          <readerQuotas maxArrayLength="1048576" />
          <security mode="Transport">
            <transport clientCredentialType="None" />
          </security>
        </binding>
      </basicHttpBinding>
    </bindings>
    <behaviors>
      <endpointBehaviors>
        <behavior name="AjaxBehavior">
          <webHttp DefaultOutgoingResponseFormat="json" />
        </behavior>
      </endpointBehaviors>
      <serviceBehaviors>
        <behavior name="DvaMfs.WcfService">
        <useRequestHeadersForMetadataAddress>
                    <defaultPorts>
                        <add scheme="https" port="443" />
                    </defaultPorts>
                </useRequestHeadersForMetadataAddress>
          <serviceMetadata httpGetEnabled="true" httpsGetEnabled="true" />
          <serviceDebug includeExceptionDetailInFaults="false" />
        </behavior>
      </serviceBehaviors>
    </behaviors>

services look like this

<service name="DvaMfs.WcfService.ProductService" behaviorConfiguration="DvaMfs.WcfService">
    <endpoint name="ProductServiceEndPoint" address="" binding="basicHttpBinding" bindingConfiguration="BasicHttpBinding" contract="DvaMfs.WcfService.IProductService" />
    <endpoint name="ProductServiceAjaxEndPoint" address="ajax" binding="webHttpBinding" bindingConfiguration="WebHttpBinding" behaviorConfiguration="AjaxBehavior" contract="DvaMfs.WcfService.IProductService" />
    <endpoint address="mex" binding="mexHttpBinding" contract="IMetadataExchange" />
    <endpoint name="ProductServiceSecureEndPoint" address="ProductServiceSecure" binding="basicHttpBinding" bindingConfiguration="SecureBasicHttpBinding" contract="DvaMfs.WcfService.IProductService" />
    <endpoint name="ProductServiceAjaxSecureEndPoint" address="ProductServiceSecureajax" binding="webHttpBinding" bindingConfiguration="SecureWebHttpBinding" behaviorConfiguration="AjaxBehavior" contract="DvaMfs.WcfService.IProductService" />
  </service>

Update 2
This is one of the endpoints failing:

<endpoint name="DataServiceSecureEndPoint" address="" binding="basicHttpBinding"
bindingConfiguration="SecureBasicHttpBinding" contract="DvaMfs.WcfService.IDataService" />