If the ground connection of the chassis or the engine goes bad in your Tucson due to rust or corrosion, you will face all sorts of electrical issues, including battery light illuminating in the dashboard. What happens when the ground connection goes bad?
For this purpose, a ground strap/wire is used to connect the engine and the chassis. The engine also requires a ground connection to function, but the way the engine is mounted, it does not allow the electric current to flow between the engine and the body (due to non-conductive rubber insulated engine mounts). The negative terminal of the battery is connected to the body/chassis of Tucson, called a ground connection. Poor ground connection What is a ground connection? When the battery charge gets too low the engine will shut down, and you will be stranded. The battery charge will go down as you drive since all the on-board electronic controllers and accessories are now solely powered by the battery. Yes, you can drive your Tucson with a bad alternator, but only for a short distance. Can you drive Tucson with a bad alternator? If you see numbers between 13.5 volts and 14.8 volts with no major fluctuations when you turn on the accessories in the vehicle, the alternator is functioning properly. If the voltage drops below 12 volts with the engine running and the accessories turned on, it means the current supply from the alternator is completely cut off and all the electronics are solely powered by the battery.If it drops and remain below 13.5 volts, it indicates a problem with the current supply from the alternator. The voltage should remain around 14 volts.Switch on the accessories in your Tucson, for example, headlights, AC fan at full speed, and interior lights.The voltage should be between 13.5 and 14.8 volts with the engine running.Connect the black cable of the multimeter to negative terminal of the battery, and the red cable to the positive terminal.
The easiest method to check the alternator is by measuring the voltage at the battery terminals when the engine is running. Before replacing the alternator, you must rule out other causes that may stop or degrade flow of current from the alternator, for example: bad electrical connection or damaged wire.
Alternators can fail at any time, but generally they last over 100,000 miles.
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