You are making sure that hoses and lines are not cut, chafed, spliced, or worn, and not tangled, pinched, or dragged against tractor parts. What are you inspecting?

During your pre-trip inspection, check the electrical lines and air hoses (or hydraulic hoses for hydraulic brakes). Make sure that the lines and hoses are not cut, chafed, spliced, or worn. Also make sure they are not tangled, pinched, or dragging on parts of the tractor.