If you have an Amp Research Step that is not retracting, it could be due to a number of issues. First, check the power source to ensure there is enough power getting to your step. If it’s receiving too little voltage, it won’t retract properly. Also, inspect the wiring harnesses for any broken or frayed wires which may cause a short in the system and prevent proper operation. Furthermore, check all of the ground connections on both ends of each component for any loose or corroded terminals as this can also prevent proper functioning. Lastly, if none of these solutions work then you may need to replace components such as a motor relay or solenoid valve which are responsible for operating your amp research step when activated by either keyfob or switch input from inside your vehicle cabin