Black button controls one direction, Yellow controls other direction. Direction is determined by how the wires were connected. For example: If yellow is up direction and you change the wires, then yellow becomes down.
Having said that: Once the direction of the buttons are determined, press the down button in until it clicks/locks in. Push you shade control button on your coach panel, the blind will start going down. When the shade reaches the bottom (where you want it to stop) push the button on the shade to release it (it will or should pop out), you bottom travel is now set. Do the opposite with other color button on the shade motor to set the top limit.
Where the problem comes in, is as the blind motor ages the set buttons tend to stick in and not pop out when you want to set the up or down position. Most of the time if you play with it enough you can get it to work.
Chuck
2000 Featherlite H3-45
2024 Jeep Grand Cherokee
Leesburg, FL