2017 Ford Explorer Side Mirror Won’t Move Up or Down? Here’s the Real Fix
If you’ve ever gotten into a vehicle and noticed something small not working—like a power mirror—you might be tempted to ignore it. But when you’re diagnosing car problems professionally, even minor issues can tell you a lot about the condition of the vehicle.
In this case, we’re looking at a 2017 Ford Explorer with a driver-side mirror that wouldn’t move up or down. Left and right worked fine, the passenger mirror worked perfectly, but vertical adjustment on the driver’s side was completely inoperative.
That might sound like a small inconvenience, but it’s actually a great example of how proper automotive troubleshooting can save time, prevent unnecessary parts replacement, and lead you straight to the root cause.
🔧 Recommended Diagnostic Tools
When you're diagnosing modern vehicles, having the right tools makes all the difference. A basic code reader will only get you so far—you need tools that let you see what’s really going on and test components properly.
The Autel MaxiSys MS906 Pro TS Scanner is a solid all-around diagnostic scanner that gives you full system access, not just engine codes. It’s especially useful when dealing with modules like door control units.
The Power Probe 3 Circuit Tester is something I use almost daily. It allows you to quickly verify power, ground, and component operation without guessing.
For chasing down wiring issues, the Power Probe ECT3000 Short Finder can save you hours by pinpointing shorts or open circuits without tearing apart the entire harness.
Vehicle Overview
Year: 2017
Make: Ford
Model: Ford Explorer 2017
System: Power side mirror (driver side)
This generation Explorer uses electronically controlled mirror actuators built into the mirror housing. These actuators control both horizontal and vertical movement using small internal motors and gearsets.
Vehicle Concern
The customer complaint was straightforward:
“Driver’s side mirror won’t move up or down.”
No other symptoms were reported. The mirror would still move left and right, and the passenger mirror operated normally in all directions.
Initial Inspection
The first step in any automotive troubleshooting process is verifying the concern—and that’s exactly what I did.
Turned the key on, operated the mirror switch, and confirmed:
Left/right movement on driver mirror: Working
Up/down movement on driver mirror: Not working
All functions on passenger mirror: Working
At this point, we already have some valuable clues.
Codes (If Applicable)
No diagnostic trouble codes were present or relevant in this case.
That’s not unusual. Mirror systems typically don’t set codes unless there’s a communication or circuit fault. Mechanical failures inside components often go undetected electronically.
Diagnostic Process
This is where experience and logic really come into play.
When diagnosing car problems like this, you want to break the system down into sections and eliminate possibilities one by one.
Step 1: Rule Out the Switch
Since both mirrors are controlled by the same switch, I switched control over to the passenger mirror and tested all directions.
Everything worked perfectly.
That tells me right away:
The switch is functioning correctly
The command signal is being sent properly
Step 2: Consider Module and Wiring
On this vehicle, mirror operation is handled through door modules. If there were a wiring issue or module failure, you’d typically see:
Multiple functions failing
No motor activity at all
Possibly issues on both mirrors
But that’s not what we have here.
Step 3: Listen to the Motor
Now comes the key moment in this diagnosis.
When I operated the driver’s mirror up and down, I could hear something happening inside the mirror housing.
Not silence. Not a dead motor.
A clicking noise.
That sound is critical.
It tells you:
The motor is receiving power
The motor is trying to operate
Something mechanical is failing inside
Step 4: Confirm Internal Failure
At this point, many technicians would remove the mirror glass and test the motor directly using a tool like a Power Probe.
That’s a solid approach, and I’ve done it plenty of times.
But in this case, I didn’t even need to go that far.
The clicking noise is a classic symptom of an internal actuator failure—specifically a stripped gear.
What’s Happening Inside the Mirror
Inside the mirror assembly is a small motor connected to a plastic gearset. These gears control the movement of the mirror in different directions.
Over time, especially with frequent use or temperature changes, those plastic gears can wear out or crack.
When that happens:
The motor spins
The gear slips
You hear a clicking or ratcheting sound
The mirror doesn’t move
Key Findings
Mirror motor was receiving power
Audible clicking noise present
Only one direction (vertical) affected
Opposite mirror functioning normally
All signs point to a mechanical failure inside the mirror actuator
Final Diagnosis
Failed driver-side mirror actuator (internal gear stripped)
The fix is straightforward:
Replace the mirror actuator motor
orReplace the entire mirror assembly (depending on condition and labor preference)
Common Causes
This type of failure is more common than you might think. Some of the typical causes include:
Normal wear and tear on plastic gears
Cold weather causing brittle components
Frequent mirror adjustments
Minor impacts or stress on the mirror housing
It’s not an electrical failure—it’s a mechanical one.
Lessons for Buyers / DIYers
This is where this case becomes especially valuable.
If you’re doing your own automotive troubleshooting or going through used car inspection tips, this is exactly the kind of issue you want to catch early.
A non-functioning mirror might seem minor, but it can indicate:
Lack of maintenance
Wear in other small components
Potential for additional hidden issues
More importantly, it shows why listening and observing symptoms carefully matters just as much as using tools.
Too many people jump straight to replacing switches or chasing wiring when the answer is sitting right in front of them.
The clicking noise in this case told the whole story.
Don’t Get Burned on Your Next Used Car
If you’re thinking about buying a used car—or even if you already have one—this is exactly the kind of problem that can slip through the cracks and cost you big money later.
After 35+ years in the automotive field, I’ve seen firsthand how often people end up with vehicles that have hidden issues just like this.
That’s why I put together a simple Used Car Guide to help you understand what to look for and how to avoid making a costly mistake.
It’s a quick, practical guide designed to give you the right mindset and approach before you buy.
👉 https://stan.store/BobbyWhiteside
Affiliate Disclaimer
Disclaimer: Some links in this post may be affiliate links. I may earn a small commission at no extra cost to you. I only recommend tools I personally use and trust in real-world diagnostics.
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