my Ford Explorer's lights flicker when I start the engine is that normal

Solution

1. Preparation

• Gather tools: multimeter, socket set, wrench set, OBD-II scanner, cleaning supplies.
• Disconnect the negative battery terminal to ensure safety.

2. Battery Inspection and Cleaning

• Remove the battery terminals (negative first, then positive).
• Clean any corrosion from the terminals and battery posts using a wire brush.
• Reconnect the terminals securely after cleaning.

3. Alternator Testing

• Reconnect the battery terminals.
• Start the engine and measure the voltage at the battery with a multimeter; it should be between 13.7 to 14.7 volts.
• If not within this range, replace the alternator.

4. Starter Motor Inspection

• Remove the starter motor (if clicking sound persists).
• Inspect electrical connections for tightness and corrosion.
• Test the starter motor using a bench test; if faulty, replace it.

5. Grounding Check

• Locate grounding points connected to the engine and body.
• Clean and tighten ground connections to ensure good conductivity.