The most common problems with electrical systems are a short or open circuit. A short circuit is what happens when a wire has rubbed through to ground causing a fuse to blow. An open circuit is what happens when a connection stops working because of a broken wire or a bad conductivity. Low battery voltage can cause strange problems to the electrical components of the car due to insufficient operating voltage. Because of the construction of wiring connectors they can sometimes create high resistance which causes heat making the connector have an open circuit. When performing wiring repairs a wiring schematic is sometimes necessary to trace wires or locate a component.
“Electricity” refers to electron flow through a circuit where one end is positive and the other negative. Actually, every object has an electrical charge, but most are so small they are impossible to detect. To power something like a motor, we have developed man made chemical cells with high electric potential: batteries. Batteries in turn lend power to starting, charging and security systems, lights, ABS, computers, sensors, climate control and onboard accessories. They are probably the first thing you think of when you hear about electricity in automotive applications, but batteries are far from alone in running the system.
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