Handbook 652 Body Electrical Diagnosis Series Circuit In a series circuit , regardless of the number of loads in the circuit, there is only one path for current. There are not many circuits on the vehicle that precisely fit this description. Principles In general, the term series is used to describe any in-line connection between electrical components. Control components in the circuit, such as a resistor or a switch, as well as circuit problems, are always in series. The term series is also used when describing the connection of test equipment, such as an ammeter.
Voltage The voltage provided by the battery or power source divides proportionally between all of the resistances in a series circuit. The component with the largest resistance, relative to the other resistances in the circuit, has the largest voltage drop. If we measure all of the voltage drops in the circuit and add them together, we always find the sum equals source voltage. Technical Training 37