why does my Honda Civic's battery light keep coming on

Solution

1. Preparation

• Gather necessary tools and parts.
• Ensure the vehicle is parked on a flat surface and the engine is off.
• Disconnect the negative battery terminal to avoid electrical shock.

2. Inspect Battery and Connections

• Check the battery terminals:
  • Clean any corrosion using a mixture of baking soda and water.
  • Tighten any loose connections.
• Reconnect the battery and ensure a secure fit.

3. Test the Alternator

• Start the engine and use a multimeter to measure voltage:
  • Expected voltage should be between 13.7 to 14.7 volts.
  • If voltage is below this range, the alternator may need replacement.
• If the alternator is faulty, proceed to replace it.

4. Replace the Alternator (if necessary)

• Remove the serpentine belt by loosening the tensioner pulley.
• Disconnect the electrical connections from the alternator.
• Remove the mounting bolts and take out the alternator.
• Install the new alternator:
  • Position it correctly and secure it with mounting bolts (torque to manufacturer specifications).
  • Reconnect the electrical connections.
• Reinstall the serpentine belt, ensuring proper routing.

5. Final Reassembly

• Reconnect the negative battery terminal.
• Start the engine and check for proper functioning of the battery warning light.