I am still new, so take the following with a grain of salt. However, as far as the ramps board is concerned, I don't think the order of 1A/1B and 2A/2B matters much. You are just completing a circuit and if the motor runs backwards, you can simply turn the plug around.
If I were you, I would use a multi-meter to check the resistance of pins 1/3 and 4/6 on your motor. They should have little to no resistance, indicating a complete circuit. Testing pin 1 against either 4 or 6 should give a resistence of 1 since they aren't wired together in the motor. Then just plug 1/3 into 1A/1B and 4/6 into 2A/2B to test the motors.
Also check your wire crimping, it always seems to be an issue for me.
Finally, use you multi-meter to check the voltage on your motor drivers. I did this by connecting the black lead to the ground on my powersupply, coming into my RAMPS board, and placing the red lead (positive) on my motor drivers potentiameter (which was metal). Start by setting the voltage to 0.4 and increasing as needed...but watch the temperature on the driver IC.
If I were you, I would use a multi-meter to check the resistance of pins 1/3 and 4/6 on your motor. They should have little to no resistance, indicating a complete circuit. Testing pin 1 against either 4 or 6 should give a resistence of 1 since they aren't wired together in the motor. Then just plug 1/3 into 1A/1B and 4/6 into 2A/2B to test the motors.
Also check your wire crimping, it always seems to be an issue for me.
Finally, use you multi-meter to check the voltage on your motor drivers. I did this by connecting the black lead to the ground on my powersupply, coming into my RAMPS board, and placing the red lead (positive) on my motor drivers potentiameter (which was metal). Start by setting the voltage to 0.4 and increasing as needed...but watch the temperature on the driver IC.