Ranger Mods

Hi all.
First question since joining and hope someone can help.
I bought a Ranger 2 weeks ago and I'm setting up the trailer plug for a van we've bought.
Previous owner had it set up for his van and I'm trying to work out what the wires are for on the lower row
on the 12 pin plug.
It's the factory harness with the trailer module under the passenger seat (factory fitment for XLT).
I spoke to the local dealer but they couldn't help.
Currently it has a Pink wire into 9
Light Blue into 11
Purple into 12
And a White wire and an Orange wire cut short just where the harness enters the plug.
Is anyone able to assist with a wiring diagram?
Need to work out what the current wiring does in order to set up the plug for our new van
Thanks

Wiring Diagrams for Trailer Module PX2

Thank you, now I understand what does what.