Pup,

This can be hard to determine without some knowledge of the lift. Lift the floorboard and look for a black box on the left side. Make sure all fuses are good. There should be a resistor at the min contactor. Check to make sure it is not broken. May have problem with right traction controller or wiring. Controller may need to be updated using computer software. Before you start digging deep, look at the back of the lift beside the tire at the back of the battery box on the left side. There is a wire harness that comes up and is covered by a thin metal plate. Have seen customer trying to move the lift using another. They end up sticking a fork into the harness. Good Luck.