Read the signal as passing from left to right across the diagram.
Learn that any point on a given line or branch has the same electrical current. Changes in current only occur after the lines meet a symbol, representing an item such as a resistor or capacitor.
Identify the grounding points as the symbols which consist of three horizontal lines with the widest on top and smallest on bottom, so they form a triangular shape.
Locate the labels on the shapes on the map and compare them with the schematic's key or the list of common symbols provided in the resources section to determine which type of item belongs at each point in the circuit.
Note the locations of resistors on the schematic, represented with two parallel lines. Resistors regulate the flow of current to prevent damage to the other elements in the circuit.