I adopted this informative guide: http://hints.macworld.com/article.php?story=20041129143420344

Here's my virtual host definition

<VirtualHost *:443>
    SSLEngine on
    SSLProxyEngine On
    RequestHeader set Front-End-Https "On"
    CacheDisable *
    SSLCipherSuite ALL:!ADH:!EXPORT56:RC4+RSA:+HIGH:+MEDIUM:+LOW:+SSLv2:+EXP:+eNULL
    DocumentRoot "/Users/me/projects/myproject/public"
    ServerName ssl.mydomain.com
    ServerAlias *.ssl.mydomain.com
    SSLCertificateKeyFile "/private/etc/apache2/certs/webserver.nopass.key"
    SSLCertificateFile "/private/etc/apache2/certs/newcert.pem"
    SSLCACertificateFile "/private/etc/apache2/certs/demoCA/cacert.pem"
    SSLCARevocationPath "/private/etc/apache2/certs/demoCA/crl"
    ErrorLog "/Users/me/Desktop/ssl.log"

    ProxyPass / https://localhost:3002/
    ProxyPassReverse / https://localhost:3002
    ProxyPreserveHost on    
</VirtualHost>

So when I attempt hooking up towards the sevre viov the internet browser, I recieve this error:

[Thu Feb 02 16:50:40 2012] [error] (502)Unknown error: 502: proxy: pass request body failed to 127.0.0.1:3002 (localhost)
[Thu Feb 02 16:50:40 2012] [error] [client 96.11.81.39] proxy: Error during SSL Handshake with remote server returned by /session/new
[Thu Feb 02 16:50:40 2012] [error] proxy: pass request body failed to 127.0.0.1:3002 (localhost) from 96.11.81.39 ()

how do you debug / fix this?

Think before with HTTPS involving the front-finish as well as your back-finish server from localhost to localhost.

Alternatively, if you want for connecting your reverse proxy towards the actual server using SSL too, make use of the SSLProxy* directives to setup the CA certs, as recorded in the introduction to the [cde] documentation.