why does my Genesis G70 battery keep dying overnight

Solution

1. Preparation

• Tools Needed: Multimeter, OBD-II scanner, socket set, battery terminal cleaner, wire brush, protective gloves, safety goggles.
• Disconnect the negative terminal of the battery to ensure safety during inspection and repair.

2. Clean Battery Terminals

• Use a battery terminal cleaner or a wire brush to remove any corrosion from the battery terminals.
• Ensure that both the positive and negative terminals are free of debris and securely connected.

3. Address Parasitic Draw

• Reconnect the negative battery terminal and set the multimeter to measure current (amps).
• Disconnect individual fuses one at a time while monitoring the multimeter until the current draw drops significantly. Identify the circuit responsible for the excessive draw.
• Repair or replace any faulty components associated with the identified circuit.

4. Check and Replace Battery

• If the battery voltage is low (under 12.4 volts), consider charging it fully or replacing it if it is old (typically over 3-5 years).
• Test the battery with a load tester to ensure it holds a charge under load.

5. Verify Alternator Functionality

• Start the engine and measure the voltage at the battery terminals again. It should read between 13.7 to 14.7 volts.
• If the voltage is lower, inspect the alternator and its connections for faults.