A typical brake system diagram shows the location and configuration of the master cylinder, the distribution of the lines, valves, hoses and cables, and the configurations of the discs and rotors. Other features of a brake system diagram include parking brake elements and vacuum components.
Colored brake system diagrams use different colors to distinguish different parts of the systems. For example, red lines indicate the brake lines from the master cylinder, while gray lines indicate parking brake cables on BrakesPlus.com, as of 2015. A simple diagram such as the one on EcihotrodBrakes.com shows the basic layout of the cylinder, lines, discs, drums and valves. Some use arrows to indicate the direction of the fluid pressure gradient. Brake system diagrams show the system components in three-dimensional images or in two-dimensional schematic drawings.