how to fix my BMW 5 Series F10/F11 (2010-2017) if the lights flicker

Solution

1. Preparation

• Gather necessary tools and parts.
• Ensure the vehicle is parked on a flat surface and the ignition is off.
• Disconnect the battery to prevent any electrical shorts.

2. Inspect and Clean Battery Connections

• Sub-steps:
  • Remove the negative terminal first, followed by the positive terminal.
  • Clean the terminals and cable connections with a wire brush and a baking soda solution to remove corrosion.
  • Reconnect the positive terminal first, followed by the negative terminal.
• Tools Required: Wire brush, baking soda, wrench set.

3. Test and Replace the Alternator (if necessary)

• Sub-steps:
  • Reconnect the battery and start the engine.
  • Use a multimeter to measure the voltage at the battery terminals; it should read between 13.8 to 14.5 volts when the engine is running.
  • If the voltage is below this range, remove the alternator (usually requires removing the serpentine belt and bracket).
  • Replace with a new or refurbished alternator and reassemble.
• Tools Required: Multimeter, socket set, serpentine belt tool.

4. Inspect Wiring and Ground Connections

• Sub-steps:
  • Visually inspect the wiring harness for any visible damage.
  • Trace the ground connections for the lighting circuits, typically located under the dashboard and near the headlights.
  • Clean and secure any loose or corroded ground connections.
• Tools Required: Socket set, wire connectors, multimeter.

5. Check and Replace Fuses

• Sub-steps:
  • Locate the fuse box (usually under the dashboard or engine compartment).
  • Identify and remove the fuses related to the lighting system using fuse pullers.
  • Inspect for blown fuses and replace them with the correct amperage.
• Tools Required: Fuse puller or needle-nose pliers.