how to fix the rear defroster not working on Ford Explorer Fifth Generation (2011-2019)

Ford Explorer Fifth Generation (2011-2019)

Error Codes

1-2 hours

Time

medium

Difficulty

medium

Severity

3 min read

538 words

Problem Statement

Learn how to diagnose and fix the rear defroster not working on Ford Explorer (2011-2019). Step-by-step guide with symptoms, tools, and repair instructions.

Affected Component

Electrical

Estimated Time

1-2 hours

⚠️ Safety Warnings

Important safety information - read before proceeding

•Disconnect the battery before working on electrical components to avoid shock or shorts.

Symptoms

•Rear window defroster grid not heating
•Defroster switch does not illuminate when activated
•No change in fogging or ice on the rear window
•Possible blown fuse related to defroster circuit
•Intermittent electrical issues in other components

Diagnostic Steps

1
Check the rear defroster switch for proper function and illumination.
2
Inspect the related fuse in the fuse box for any blown fuses.
3
Use a multimeter to test the voltage at the rear window defroster grid.
4
Visually inspect the rear defroster grid for any breaks or damage.
5
Check the wiring harness for continuity and secure connections.
6
Scan the vehicle's OBD-II system for any related error codes.

Solution

💡 Expert Tip

For complex repairs like this, consider taking photos at each step. This helps if you need to reverse a step or consult with a mechanic. Also, keep all removed parts organized - you may need to reference them during reassembly.

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
•Fuse puller
•Screwdriver set
•Wire strippers/crimpers

Parts Required

•Replacement fuse
•Rear defroster repair kit

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Diagnostic Steps

1
Check the rear defroster switch for proper function and illumination.
2
Inspect the related fuse in the fuse box for any blown fuses.
3
Use a multimeter to test the voltage at the rear window defroster grid.
4
Visually inspect the rear defroster grid for any breaks or damage.
5
Check the wiring harness for continuity and secure connections.
6
Scan the vehicle's OBD-II system for any related error codes.

Solution

1. Preparation

Gather necessary tools and parts.
Disconnect the negative battery cable to ensure safety.

Tools Required:

Multimeter
Socket set
Fuse puller
Screwdriver set
Wire strippers/crimpers (if wiring repairs are needed)

2. Inspect and Replace Fuse

Locate the fuse box, typically under the dashboard or in the engine compartment.
Identify the rear defroster fuse using the diagram on the fuse box cover.
Remove the fuse using a fuse puller and inspect it for damage.
If the fuse is blown, replace it with a new fuse of the same amperage.

3. Inspect the Rear Defroster Grid

Remove any obstructions or trim panels covering the rear defroster grid.
Visually check the grid for broken lines or detachment from the glass.
If damage is found, use a rear defroster repair kit to re-establish the connections.

4. Test Voltage at the Defroster Grid

Reconnect the negative battery cable.
Turn on the rear defroster switch.
Use a multimeter to measure voltage at the rear defroster grid terminals.
If voltage is present and the grid is intact, the grid is functioning properly.

5. Inspect Wiring and Connections

Follow the wiring harness from the rear defroster to the switch and fuse box.
Look for any frayed wires or loose connections.
Repair any damaged wiring with wire strippers and crimpers, ensuring secure connections.