Here is a link that you need to check out http://www.hardi.com.au/en-au/TechnicalInfo/~/media/extranet/australia/Website/Support/manuals%20operators/controllers/Trimble-HC5500-Installation_0909.ashx  Click on the link and it will download, may take a little time, just wait for it.

It is a guide for connecting Trimble Ez-guide 500 auto section to Hadrdi 5500 controller.
On page 13 it says "Note: the Hardi 5500 controller must have firmware version 3.16 or higher installed and have a Jobcom control box connected for it to work correctly with the Ez-guide 500 lightbar."

Some sprayers have the Jobcoms some don't. Depends on model.

This guide tells you everything you need to do to have auto-section control.

My dealer quoted me $1,495.00 for the jobcom, $30.00 for a cable & $750.00 for the unlock code.
$2,275.00 total to do it,  If you don't already have the Jobcom.