why does my Ford Mustang S650 (2024-Present) battery light keep coming on?

Solution

1. Preparation

• Tools Required: OBD-II scanner, multimeter, load tester, socket set, torque wrench.
• Ensure the vehicle is parked on a flat surface and the engine is turned off.
• Disconnect the negative battery terminal before beginning any work for safety.

2. Inspect and Clean Battery Connections

• Remove the positive terminal followed by the negative terminal.
• Clean any corrosion from the terminals and cable ends using a wire brush and a mixture of baking soda and water.
• Reconnect the terminals, starting with the positive terminal first, and ensure they are tight.

3. Replace the Battery (if necessary)

• If the load test indicates a weak or failing battery, remove the battery by:
  • Disconnecting the negative terminal first.
  • Removing the positive terminal.
  • Unscrewing the hold-down bracket and lifting the battery out.
• Install the new battery, securing it in place and connecting the terminals in the reverse order (positive first).

4. Alternator Replacement (if necessary)

• If the alternator is tested and found faulty:
  • Disconnect the negative battery terminal.
  • Remove the serpentine belt by releasing the tensioner with a socket wrench.
  • Unplug the electrical connector from the alternator and remove any retaining bolts.
  • Install the new alternator by reversing the steps and ensuring all connections are secure.
  • Reattach the serpentine belt, ensuring proper routing.