Working on configuring the Garmin autopilot to include the 507 head unit and pitch and roll GSA28 servos. I have pitch working and my Ray Allen trim for pitch and roll work but I can’t seam to get the roll servo to move. I verified all the pin outs are correct including the canbus termination jumper. It engages and disengages as you can hear that but no command on the 507 or GDU for heading changes results in any movement. I increased the torque and went back thru the set up in the manual and everything seams to be correct. Any suggestions