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Home/Cars/Ford/Explorer/Sixth Generation (2020-present)/my Ford Explorer's lights flicker when I start the engine is that normal

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

Ford Explorer Sixth Generation (2020-present)

Severity: mediumDifficulty: medium1-3 hours
3 min read
420 words

Problem Statement

Learn how to diagnose and fix flickering lights when starting your Ford Explorer. Step-by-step guide with diagnostic procedures and repair instructions.

Component
Electrical
Repair Time
1-3 hours

Safety Warnings

  • ⚠Disconnect battery before working on electrical components to avoid shock or short circuits

Symptoms

  • •Flickering lights upon engine start
  • •Dimming of dashboard lights
  • •Battery warning light illuminated
  • •Clicking sound when turning the key
  • •Slow cranking of the engine

Diagnostic Steps

  1. 1Check battery condition with a multimeter (should read 12.4 volts or higher when at rest)
  2. 2Inspect battery terminals for corrosion or loose connections
  3. 3Test the alternator output while the engine is running (should read between 13.7 to 14.7 volts)
  4. 4Check the grounding connections of the battery and engine
  5. 5Inspect the starter motor for proper operation and connections
  6. 6Use an OBD-II scanner to check for any stored error codes related to the electrical system

Solution

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.

Verification

After completing the repair, verify that the issue has been resolved:

  • Test the affected component to ensure it functions correctly
  • Check for any error codes or warning lights
  • Monitor the vehicle for a few days to ensure the issue does not recur

Prevention Tips

To prevent this issue from occurring again:

  • •Follow the manufacturer's recommended maintenance schedule
  • •Address warning signs early before they develop into major issues
  • •Use quality parts and fluids recommended for your vehicle
  • •Keep detailed records of all repairs and maintenance

Tools & Equipment Required

  • Multimeter
  • Socket set
  • Wrench set
  • OBD-II scanner
  • Wire brush

Parts Required

  • Replacement battery (if faulty)
  • Replacement alternator (if faulty)
  • Replacement starter motor (if faulty)

Additional Information

Component

Electrical

Repair Time

1-3 hours

Difficulty

medium

Severity

medium

Tools

5 items

Parts

3 items

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