Tip & How-To about Chevrolet C1500
I have seen many times a 12 volt car battery pass the diagnostic test performed at a repair shop but still fail while being used in the car.
A simple test to do at home is the cranking amps test. Place your 12 volt meter on the battery and check for 12 volts. Then looking at the meter crank the car over. If the voltage drops to 10 volts with all accessories off then the batteries cranking storage amps is weak. A bad scenerio would be the battery drops to below 9 volts. Below 9.6 volts there is not enough electricty to provide good spark to fire the engine.
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