Driver Window Not Working? How I Diagnosed a 2014 Nissan Murano Window Failure Step-by-Step
Introduction
Power window problems can be deceptively simple—or surprisingly tricky. What looks like a bad motor can actually be a wiring issue, a failed switch, or even a control problem depending on the vehicle. That’s why diagnosing car problems like this requires a methodical approach.
In this case, I was working on a 2014 Nissan Murano with a very specific set of symptoms: the driver window was completely inoperative, and the passenger front window wouldn’t respond from the master switch—but worked fine from its own door switch. The rear windows? No issues at all.
This is exactly the kind of situation where guessing gets expensive. Let’s walk through how proper automotive troubleshooting led to the correct fix without wasting time or replacing unnecessary parts.
🔧 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.
Autel MaxiSys MS906 Pro TS Scanner (TPMS + full system diagnostics)
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This is a solid professional-grade scan tool that gives you access to all modules, live data, and bi-directional controls—far beyond what entry-level scanners can do.
Power Probe 3 Circuit Tester
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One of the fastest ways to check power, ground, and circuit behavior. It’s invaluable for verifying whether components are actually receiving commands.
Power Probe ECT3000 Short Finder
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Perfect for tracking down broken or shorted wires without tearing apart the entire harness—saves a ton of time on electrical diagnostics.
Vehicle Overview
The 2014 Nissan Murano uses a fairly straightforward power window system compared to newer vehicles. There are no separate door control modules—everything is largely controlled through the driver’s master window switch, with some support from the body control module (BCM).
That detail becomes important later.
Vehicle Concern
Here were the exact symptoms:
Driver (left front) window: completely inoperative
Passenger (right front) window: works from passenger switch, but not from master switch
Rear windows: operate normally from master switch
Right away, this combination tells you something important: not all systems are failing equally.
Initial Inspection
First step in any automotive troubleshooting process is verifying the basics.
The master switch was removed and checked for:
Power supply
Ground integrity
Both were present and stable.
That immediately rules out:
Blown fuses
Main power supply issues
Ground failures
At this point, we know the switch is at least powered and capable of operating.
Codes (if applicable)
A full system scan was performed using a professional scan tool.
The result:
No fault codes related to windows
Only unrelated TPMS codes stored in the BCM
This is important because many people expect a code for every problem—but electrical failures like this often won’t set one.
So now we move into hands-on testing.
Diagnostic Process
This is where experience really comes into play.
Using a Power Probe, I monitored the output circuits directly at the master switch while operating each window.
Here’s what I found:
When commanding the rear windows:
Voltage switched correctly
Signals were present and consistent
That confirmed:
The master switch is capable of sending commands
Internal circuitry is partially functional
Then I tested the front windows.
When commanding the passenger front window from the master switch:
No voltage change on any corresponding wires
When commanding the driver window:
No voltage output at all
This is the turning point in the diagnosis.
At this stage, you have to think logically.
If this were a wiring problem:
You would still see voltage leaving the switch
The signal just wouldn’t reach the motor
But in this case:
There was no output from the switch itself
That eliminates:
Door harness issues
Window motors
Downstream wiring
Everything points back to the switch.
Key Findings
Power and ground confirmed at master switch
Rear window circuits functioning normally
No output signals for front windows from master switch
Passenger window operates independently from its own switch
These findings clearly isolate the failure to the master switch assembly.
Final Diagnosis
The driver’s master window switch has an internal failure affecting the front window control circuits.
Replacement of the master switch restores proper operation of both the driver and passenger front windows.
Common Causes
This type of failure is more common than many people realize, especially on vehicles like the Murano.
Here are the typical causes:
Internal contact wear from repeated use
Heat buildup causing circuit board damage
Higher current load on front window circuits
Age-related electrical degradation
Front windows get used far more than rear windows, so it’s no surprise those circuits fail first.
Lessons for Buyers / DIYers
This is where good used car inspection tips can save you money.
If you’re checking out a vehicle, always:
Test every window from every switch
Don’t assume “it’s just a fuse”
Pay attention to partial failures (those are clues)
A situation like this can easily mislead someone into thinking they need:
A window motor
A regulator
Or even wiring repair
But as you’ve seen, proper diagnosing car problems avoids unnecessary parts and wasted time.
Also, don’t rely solely on scan tools. Not every issue will set a code. Real diagnostics still require hands-on testing and understanding how systems actually work.
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
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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