Automobiles contain many different types of circuits. Multimeters are designed to test different parts of a circuit to locate the problem.
Each circuit uses electrical wires to carry both power and signal information to other components.
Over time, these wires can become damaged due to misuse, accidents and component failure.
These failures can cause both short circuits and open circuits---both of which render the wires unusable. The hardest part of fixing a wire involves locating the defective one---a process with which a multimeter can help.
