Diagnosis and Troubleshooting of Automotive Electrical, Electronic, and Computer Systems, Fifth Edition By James D. Halderman © 2010 Pearson Higher Education,

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Diagnosis and Troubleshooting of Automotive Electrical, Electronic, and Computer Systems, Fifth Edition By James D. Halderman © 2010 Pearson Higher Education, Inc. Pearson Prentice Hall - Upper Saddle River, NJ FIGURE 17-1 A visual inspection of this battery showed that the electrolyte level was below the plates in all cells.

Diagnosis and Troubleshooting of Automotive Electrical, Electronic, and Computer Systems, Fifth Edition By James D. Halderman © 2010 Pearson Higher Education, Inc. Pearson Prentice Hall - Upper Saddle River, NJ FIGURE 17-2 Corrosion on a battery cable could be an indication that the battery itself is either being overcharged or is sulfated, creating a lot of gassing of the electrolyte.

Diagnosis and Troubleshooting of Automotive Electrical, Electronic, and Computer Systems, Fifth Edition By James D. Halderman © 2010 Pearson Higher Education, Inc. Pearson Prentice Hall - Upper Saddle River, NJ FIGURE 17-3 Many maintenance-free batteries can be opened to check the electrolyte level without damaging the battery. Notice the surface dirt, which could cause the battery to self-discharge.

Diagnosis and Troubleshooting of Automotive Electrical, Electronic, and Computer Systems, Fifth Edition By James D. Halderman © 2010 Pearson Higher Education, Inc. Pearson Prentice Hall - Upper Saddle River, NJ FIGURE 17-4 The electrolyte level is correct if the liquid looks curved when observed from above. This curve is called the meniscus and is formed when the liquid clings to the surface of the fill tube in each cell (if equipped).

Diagnosis and Troubleshooting of Automotive Electrical, Electronic, and Computer Systems, Fifth Edition By James D. Halderman © 2010 Pearson Higher Education, Inc. Pearson Prentice Hall - Upper Saddle River, NJ FIGURE 17-5 (a) A battery voltage of volts is definitely not fully charged and should be charged before testing. (b) A battery that measures volts or higher after the surface charge has been removed is 100% charged.

Diagnosis and Troubleshooting of Automotive Electrical, Electronic, and Computer Systems, Fifth Edition By James D. Halderman © 2010 Pearson Higher Education, Inc. Pearson Prentice Hall - Upper Saddle River, NJ FIGURE 17-6 A Sun Electric VAT-40 (volt amp tester—Model 40) connected to a battery for load testing. The technician turns the load knob until the ammeter registers an amperage reading equal to one-half of the battery’s CCA rating. The load is maintained for 15 seconds, and the voltage of the battery should be higher than 9.6 volts at the end of the time period with the load still applied.

Diagnosis and Troubleshooting of Automotive Electrical, Electronic, and Computer Systems, Fifth Edition By James D. Halderman © 2010 Pearson Higher Education, Inc. Pearson Prentice Hall - Upper Saddle River, NJ FIGURE 17-7 A typical battery load tester hookup.

Diagnosis and Troubleshooting of Automotive Electrical, Electronic, and Computer Systems, Fifth Edition By James D. Halderman © 2010 Pearson Higher Education, Inc. Pearson Prentice Hall - Upper Saddle River, NJ FIGURE 17-8 This battery has cold-cranking amperes (CCA) of 550 A, cranking amperes (CA) of 680 A, and load test amperes of 270 A listed right on the top label. Not all batteries have all of this information.

Diagnosis and Troubleshooting of Automotive Electrical, Electronic, and Computer Systems, Fifth Edition By James D. Halderman © 2010 Pearson Higher Education, Inc. Pearson Prentice Hall - Upper Saddle River, NJ FIGURE 17-9 An alternator regulator battery starter tester (ARBST) automatically loads the battery with a fixed load for 15 seconds to remove the surface charge, then removes the load for 30 seconds to allow the battery to recover, and then reapplies the load for another 15 seconds. The results of the test are then displayed.

Diagnosis and Troubleshooting of Automotive Electrical, Electronic, and Computer Systems, Fifth Edition By James D. Halderman © 2010 Pearson Higher Education, Inc. Pearson Prentice Hall - Upper Saddle River, NJ FIGURE The minimum capacity test voltage varies with battery temperature.

Diagnosis and Troubleshooting of Automotive Electrical, Electronic, and Computer Systems, Fifth Edition By James D. Halderman © 2010 Pearson Higher Education, Inc. Pearson Prentice Hall - Upper Saddle River, NJ FIGURE Most light-duty vehicles equipped with two batteries are connected in parallel as shown. Two 500 A,12 volt batteries are capable of supplying 1,000 amperes at 12 volts, which is needed to start many diesel engines.

Diagnosis and Troubleshooting of Automotive Electrical, Electronic, and Computer Systems, Fifth Edition By James D. Halderman © 2010 Pearson Higher Education, Inc. Pearson Prentice Hall - Upper Saddle River, NJ FIGURE Many heavy-duty trucks and buses use two 12 volt batteries connected in series to provide 24 volts.

Diagnosis and Troubleshooting of Automotive Electrical, Electronic, and Computer Systems, Fifth Edition By James D. Halderman © 2010 Pearson Higher Education, Inc. Pearson Prentice Hall - Upper Saddle River, NJ FIGURE The display on an electronic battery tester showing that the battery tested was good. It compares the rated CCA rating with the measured CCA capacity to help determine if the battery is good.

Diagnosis and Troubleshooting of Automotive Electrical, Electronic, and Computer Systems, Fifth Edition By James D. Halderman © 2010 Pearson Higher Education, Inc. Pearson Prentice Hall - Upper Saddle River, NJ FIGURE Battery charging guide. Battery charging times vary according to state of charge, temperature, and charging rate.

Diagnosis and Troubleshooting of Automotive Electrical, Electronic, and Computer Systems, Fifth Edition By James D. Halderman © 2010 Pearson Higher Education, Inc. Pearson Prentice Hall - Upper Saddle River, NJ FIGURE A typical industrial battery charger. Be sure that the ignition switch is in the off position before connecting any battery charges. Connect the cables of the charger to the battery before plugging the charger into the outlet. This helps prevent a voltage spike that could occur if the charger happened to be accidentally left on. Always follow the battery charger manufacturer’s instruction.

Diagnosis and Troubleshooting of Automotive Electrical, Electronic, and Computer Systems, Fifth Edition By James D. Halderman © 2010 Pearson Higher Education, Inc. Pearson Prentice Hall - Upper Saddle River, NJ FIGURE Adapters should be used on side-terminal batteries when charging.

Diagnosis and Troubleshooting of Automotive Electrical, Electronic, and Computer Systems, Fifth Edition By James D. Halderman © 2010 Pearson Higher Education, Inc. Pearson Prentice Hall - Upper Saddle River, NJ FIGURE Jumper cable usage guide. Notice that the last connection should be the engine block of the disabled vehicle to help prevent the spark that normally occurs from igniting the gases from the battery.

Diagnosis and Troubleshooting of Automotive Electrical, Electronic, and Computer Systems, Fifth Edition By James D. Halderman © 2010 Pearson Higher Education, Inc. Pearson Prentice Hall - Upper Saddle River, NJ FIGURE A typical battery jump box used to jump start vehicles. These hand-portable units have almost made jumper cables obsolete.

Diagnosis and Troubleshooting of Automotive Electrical, Electronic, and Computer Systems, Fifth Edition By James D. Halderman © 2010 Pearson Higher Education, Inc. Pearson Prentice Hall - Upper Saddle River, NJ FIGURE The code on the Delphi battery indicates that it was built in 2005 (5), in February (B), on the 11th (11), during third shift (C), and in the Canadian plant (Z).

Diagnosis and Troubleshooting of Automotive Electrical, Electronic, and Computer Systems, Fifth Edition By James D. Halderman © 2010 Pearson Higher Education, Inc. Pearson Prentice Hall - Upper Saddle River, NJ FIGURE (a) Memory saver. The part numbers represent components from Radio Shack. (b) A schematic drawing of the same memory saver. Some experts recommend using a 12 volt lantern battery instead of a small 9 volt battery to help ensure that there will be enough voltage in the event that a door is opened while the vehicle battery is disconnected. Interior lights could quickly drain a small 9 volt battery.

Diagnosis and Troubleshooting of Automotive Electrical, Electronic, and Computer Systems, Fifth Edition By James D. Halderman © 2010 Pearson Higher Education, Inc. Pearson Prentice Hall - Upper Saddle River, NJ FIGURE This mini clamp-on digital multimeter is being used to measure the amount of battery electrical drain that is present. In this case, a reading of 20 mA (displayed on the meter as A) is within the normal range of 20 to 30 mA. Be sure to clamp around all of the positive battery cable or all of the negative battery cable, whichever is easiest to get the clamp around.

Diagnosis and Troubleshooting of Automotive Electrical, Electronic, and Computer Systems, Fifth Edition By James D. Halderman © 2010 Pearson Higher Education, Inc. Pearson Prentice Hall - Upper Saddle River, NJ FIGURE Parasitic load tool. After connecting the shut-off tool, start the engine and operate all accessories. Stop the engine and turn everything off. Connect the ammeter across the shut-off switch in parallel. Wait 20 minutes. This time allows all electronic circuits to “timeout” or shutdown. Open the switch—all current now will flow through the ammeter. A reading greater than specified (usually greater than 50 milliamperes [0.05 ampere]) indicates a problem that should be corrected.

Diagnosis and Troubleshooting of Automotive Electrical, Electronic, and Computer Systems, Fifth Edition By James D. Halderman © 2010 Pearson Higher Education, Inc. Pearson Prentice Hall - Upper Saddle River, NJ FIGURE The battery was replaced in this Acura and the radio displayed “code” when the replacement battery was installed. Thankfully, the owner had the five-digit code required to unlock the radio.

Diagnosis and Troubleshooting of Automotive Electrical, Electronic, and Computer Systems, Fifth Edition By James D. Halderman © 2010 Pearson Higher Education, Inc. Pearson Prentice Hall - Upper Saddle River, NJ FIGURE Many newer vehicles have batteries that are sometimes difficult to find. Some are located under plastic panels under the hood, under the front fender, or even under the rear seat. The battery in this Lincoln LS was located in the trunk next to the spare tire. The jump start instructions indicate that the spare tire hold-down bolt is to be used as the ground connection if jump starting is necessary.