Tail Lamps. Inspect tail lamps for: Stop Lamps. Inspect stop lamps for: Turn Signal Lamps. Inspect turn signal lamps for: Hazard Warning Lamps. Inspect hazard warning lamps for: Side Marker Lamps. Side marker lamps may function as both side marker and clearance lamps. Inspect side marker lamps for: Clearance Lamps. Clearance lamps are not required on vehicles less than 80 inches in width or on rear of truck tractors. Inspect clearance lamps for: Identification Lamps. Identification lamps are not required on vehicles less than 80 inches in width. Inspect identification lamps for: License Plate Lamp or Lamps. Inspect license plate lamp or lamps for: Additional Lamps (if Equipped). Reflectors.