Bedroom slide breaking shear pins

I'm not an electrician so I don't know the part names, but odds are you have a bad electronic part that stops the slides. (maybe somebody knows the name) The part acts as a limiting switch, but it isn't a limiting switch. Is a self contained piece that senses a power surge when the slide is fully open or fully closed. Basically when the motor starts to draw more power when the slide hits the stops the device senses that power draw and cuts off the power stopping the slide. Your power steps have the same device that stops the steps when they are fully up or fully out. This device would also stop the slide if you opened the slide into a tree or wall.