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check it  Short Course on Brakes The modern automotive brake system has been refined for over 100 years and has become extremely dependable and efficient. The typical brake system consists of  disk brakes  in front and either  disk  or  drum brakes  in the rear connected by a system of  tubes and hoses  that link the brake at each wheel to the  master cylinder.    Other systems that are connected with the brake system include the  parking brakes ,  power brake   booster  and the  anti-lock  system. When you step on the brake pedal, you are actually pushing against a plunger in the master cylinder, which forces hydraulic oil ( brake fluid ) through a series of tubes and hoses to the braking unit at each wheel. Since hydraulic fluid (or any fluid for that matter) cannot be compressed, pushing fluid through a pipe is just like pushing a steel bar through a pipe.  Unlike a steel bar, h...

click here Understanding  your dashboard gauges The minimum number of gauges on a passenger car dashboard are the speedometer and the fuel gauge. The most common additional gauge is the temperature gauge followed by the tachometer, voltmeter and oil pressure gauge. If your car does not have a temperature gauge, oil pressure gauge or charging system gauge, then you will have a warning light for these functions. The most common configuration in today's CarParts.com is: Speedometer, Tachometer, Fuel & Temperature. Typical instrument panel (this one is from a 2004 Ford Taurus) Note: To find out more about the gaugeson your car, the best source of information is your owner's manual. Speedometer In the past, the most used of the gauges. The speedometer was usually driven by a cable that spins inside a flexible tube.  The cable is connected on one side to the speedometer, and on the other side to the speedometer gear inside the transmission.  Today, just about a...

check it Automotive Air Conditioning Systems T oday, as we drive our automobiles, a great many of us, can enjoy the same comfort levels that we are accustomed to at home and at work. With the push of a button or the slide of a lever, we make the seamless transition from heating to cooling and back again without ever wondering how this change occurs. That is, unless something goes awry. (Article Continues below) S ince the advent of the automotive air conditioning system in the 1940's, many things have undergone extensive change. Improvements, such as computerized automatic temperature control (which allow you to set the desired temperature and have the system adjust automatically) and improvements to overall durability, have added complexity to today's modern air conditioning system. Unfortunately, the days of "do-it-yourself" repair to these systems, is almost a thing of the past. T o add to the complications, we now have tough environmental regulation...

check it ON BOARD DIAGNOSTICS ( OBD )   WHAT IS IT AND WHAT DOES IT MEAN TO YOU?   OBD , or on board diagnostics, was first introduced by General Motors in 1981. The purpose of  OBD  was to monitor the emission control system in the car. When the computer system of the car sees a fault in the emission control system, three things are supposed to happen. First, it would set a warning light on the dashboard, to inform the driver that a problem existed. Second, to set a code in the computer. Third to record that code in the computers memory, that can be later retrieved by a technician for diagnosis and repair.   This system worked so well, in 1986 California mandated that all cars sold in the state be equipped with  OBD . This then became an industry standard throughout the nation, and all cars sold in the nation had some form of OBD    This first version of OBD had a lot of shortcomings. First, it only covered the engine emission sys...

check it The Starting System The "starting system", the heart of the electrical system in your car, begins with the  Battery . The key is inserted into the  Ignition Switch   and then turned to the start position. A small amount of current then passes through the  Neutral Safety Switch   to a  Starter Relay   or  Starter Selenoid   which allows high current to flow through the  Battery Cables to the  Starter Motor . The starter motor then cranks the engine so that the piston, moving downward, can create a suction that will draw a  Fuel/Air  mixture into the cylinder, where a spark created by the  Ignition System  will ignite this mixture. If the  Compression  in the engine is high enough and all this happens at the right  Time , the engine will start. Battery The automotive battery, also known as a lead-acid storage battery, is an electrochemical device that produces voltage and delive...