Auto bed levelling with Rumba board - Servo not deploying Has anyone succeeded in installing the auto bed levelling on a Rumba board with Marlin firmware?

I have the last stable version 1.1.0 RC6.

I would appreciate some direction especially about:


How and which pin to activate for the servo?
How to test it with G-code before I move to settings of the probe sequence?


I have only installed the hardware for now (5 V servo) connected to Ext. 3 (EXP3):


Pin 2 (+5V);
Pin 4 (GND), and;
Pin 6 (PWM),






but I cannot move it with the G-code command M280 P0 S180. I have no idea where to put my hands on firmware to get this going. However my ultimate goal is to set the ABL.
For future reference.

My issue about the servo not moving was caused by a wiring mistake.
The Exp. 3 has 14 pins has per this diagram.



However when phisically looking at the board, what you see is this:


I took the first 2 pins on the right of such connector and the 3rd one of the first row thinking that I was connecting pins 2-4-5 of Exp. 3.
I was wrong, because the first 2 (1-2) pins are not part of Exp. 3.

The right way to connect the servo is as following:


Then use PWM1 (pin 5 Ext.3)
I decided to leave trace of this issue and the relevant solution for someone that may experience the same issue.