Fan on Pin D9 no output
I have my extruder fan plugged into D9 on my Ramps 1.4 board, in the Repetier firmware #define FAN_BOARD_PIN was at -1 as well as in Pins.h as per default. The red light which indicates the fan is on does not light up and i am getting zero voltage from D9. I changed #define FAN_BOARD_PIN to 9 as well as Pins.h to 9 according to another forum post. I am still seeing zero voltage from D9. Everything else seems to be working perfectly except the fan. I would put the fan across the AUX 12v but my Z-probe uses that, are there any other inputs that might turn the fan?