Sense Operating Conditions

Other components use resistance in sensing and monitoring operating conditions. The resistance added to or subtracted from a sensing circuit changes the current flow which is used for input to a control device, gauge, or actuator. The coolant temperature sensor uses a device that changes resistance with temperature. The fuel-level sensor uses a type of potentiometer, or sliding-contact resistance. The automatic headlamp control uses a photoresistor. The manifold vacuum sensor uses a crystal which changes resistance with pressure. And, with the use of electronic control systems growing rapidly, many more sensors and actuators are using the variation of resistance to operate.

TYPICAL ELECTRICAL LOADS

TYPICAL ELECTRICAL LOADS

GAUGES AND ACCESSORIES
Do It Yourself Car Diagnosis

Do It Yourself Car Diagnosis

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