How to: Acura MDX 2007-2013 no power windows, sunroof, gas/fuel door or rear door fix

So recently my 2008 MDX rear windows didn’t work. We recently replaced driver side window switch but that didn’t fix the issue, so I was wondering what other issue it might be. With some research, I was able to pin point the issue to the MDX window wire harness  or the correct term known as the door sub-wire. Some owners might develop a combination of issues such as fuel door, sunroof, rear hatch, or various power windows not working.  My specific issue was the rear passenger and driver side windows were not going down. What’s my guess to what caused the door sub-wire to have issues? After 10 years, with enough opening and closing the doors the wires will develop fatigue and tear off.  Luckily, the wiring harness was cheap and it was a simple 10 minutes job for me.  I’ll show you how I fixed it.

What you’ll need:

How to: 

1. Make sure you have a replaceable door sub-wire. The lowest price I can find on the internet was from Amazon.com

 

2.  Locate the sub-wires. They will be located in the front left driver side, in between the door and the car.

View of the left sub-wire

View of the right of the sub-wire

3. Pull back the left side sub-wire rubber grommet and plug.

It should easily come off. Feel free to use some force. 

What it looks like pulled back.


Use your fingers or a flat head screw driver to push on the top of the plug so you can release it. Push down and pull the plug.

4. Pull back the right side of the rubber grommet and plastic retainer. The plastic retainer might be a little stubborn. This is where the flat head screw driver came in handy for me. I wedged it in between the plastic retainer and forced it out.

I found it easier to pull out the rubber grommet from the bottom.


The plastic retainer might be a little stubborn. What helped me was a flat head screwdriver to pry it out.

5. Unplug, the sub-wire’s green plugs and clip under the dash. They are right next to the e-brake pedal. It helped me tremendously to push down the e-brakes for more working space.

I made three red circles in this picture to show what needs to be unplugged. Two green plugs and one plastic retainer clip.

6.  Once everything is unplugged. Pull out the wires from the front.

7.  When everything is pulled out, feed the new wire harness back in. This might be the most difficult part. It might take a little jiggling, pulling the wire out and pushing it back in so you can see it from under the dash. A flashlight came in handy for spotting the green plug.

8.  Lastly, put everything back and you’re done!

The Culprit

As expected, the reason the rear windows were not working was because of a broken wire.

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