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Trailer Wiring Harness Installation - 2014 Nissan Murano

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How to Install a Trailer Wiring Harness on a 2014 Nissan Murano

Today in our 2014 Nissan Murano, we're going to review and install the tow-ready, custom fit vehicle wiring harness with four pole trailer connector, part number 118653. This is a standard four flat trailer connector with a ground wire, running light, driver side turn signal and brake, and passenger side turn signal and brake circuits. Fits most standard four flat trailer connectors. Built on here is a nice cap for protecting the four flat end and it stores nicely inside. With our tow-ready harness installed, we can open up the rear cargo area and center cover and see that it's nicely stored inside, and out of the elements. To use it, we'll simply take the four flat connector, run it out over the threshold, making sure that we stay away from the latch. Then we can go ahead and close the rear hatch on it as the weather stripping is thick enough that it won't harm the wire. Once the door is closed, we'll pull out what wire is necessary to run down to our hitch or accessory. Once we're finished using our four flat connector, we can simply open up the rear hatch storage compartment and store it in with the spare tire.

Now let's go ahead and show you how to install it. To begin our install, we need to open up the rear hatch. We need to remove the interior panels so that we can gain access behind the tail lights. We're going to with the floor coverings here. Center one, we can lift up and out of the way. On the corner, we'll just lift them up and set them aside for reinstallation later. Next, we're going to remove the rear threshold.

There are a total of three pushpin fasteners just like this one here. This is the center one. There's one on each outside edge. To remove it, we'll pry out on the center of the fastener to release it, then we can remove it completely. Once we have the three fasteners out, we'll go ahead and pull up on the threshold to release the fasteners underneath.

There, there, there, there. We can set it aside for installation later. Next, to give ourselves plenty of working room, we're going to take the two storage compartments out, one on each side. Each one is held in with two fasteners. Take the fasteners out, then we can pull out the corner storage compartment. Here on the passenger side, it's also the spare tire storage.

You may need to take some of the tools out to gain access to the fasteners. Next, we're going to remove the large cargo hook. To do that, we need to open up the cap. I'm just using a small screwdriver to pop it free. Roll it down. Now, remove the bolt underneath. We can go ahead and pull the cargo hook out and set it aside. Next, we're going to remove the two pushpin cargo hooks. To remove them, we'll need to pry out on the center of the cap, and then remove it completely. With those removed, we'll go ahead and repeat the same process on the driver's side. Next, we're going to pull back on the interior paneling so we can gain access to the manufacturer's wiring. Keep in mind, there are several fasteners underneath. They'll need to be popped free. You can use an interior trim panel tool or a flat bladed screwdriver. As we pull the panel back, we can see here the wiring that comes form the tail light assembly. Once we locate the two connectors, we're going to go ahead and separate them. To do that, we'll press in the locking tab and then separate the two connectors. Next, we'll bring in the new custom fit wiring harness. Here on the driver's side, we'll use the yellow and brown wire T connector. Once side will fit into the harness, the other side will fit into the tail light wiring. Next, we're going to take the red and green wire connector, route it over to the passenger side, and repeat the same process. As you route over to the passenger side, we're basically just going to follow the manufacturers wiring that runs below the threshold. Now, as we go back over toward the driver's side, I'm going to go ahead and secure the wiring harness to the manufacturer's wiring. Now, we're back over here on the driver's side. We're going to take the converter box and mount it to the body of the vehicle. We can use a self tapping screw and secure it directly here to the sheet metal. Now, we have a good secure mount. Next we'll take the white wire with the preinstalled ring terminal that comes form our converter box. This is going to provide the ground for not only the converter box, but our four pole trailer connector. To ground it, we're going to attach it to the body of the vehicle using the self tapping screw provided with the install kit. Note, I recommend to find a location where the sheet metal doubles up, just like this one, for a good secured ground. Next, we'll take the black wire that comes from the converter box and we follow that wire. It has an inline fuse holder with a 15 amp fuse. Built into the power wire that's going to connect directly to the manufacturers power wire here that's taped to the wiring harness. We pull it free from the tape. We can then take the two connectors and plug them together. Now, we can go ahead and secure all of our wiring here in the rear cargo area. Quick tech tip, note that I'm making sure I have access to my fuse here at the rear of the vehicle. Additionally, we'll make sure we don't zip tie the rubber hose that runs across the rear here. This is actually for the windshield washer bottle so we don't want to pinch it off so that the rear sprayer doesn't work. Once all the wiring is secured, I'm going to go ahead and cut off the access and the zip ties to clean up the install look. Our wiring is installed. Let's go ahead and reinstall the interior paneling. Once we get it in place, we'll go ahead and reinstall our fasteners and the spare tire tools. Next, we're going to move underneath the hood. We need to remove the fuse panel cover here on the driver's side. We release the fasteners that secure it, both top and bottom, just lift it off. Here, about the middle of the fuse box cover, we'll locate the manufacturer's trailer fuse location. It can handle up to a 30 amp fuse. Provided with our install kit is a 15 amp fuse to put into the manufacturer's fuse port. Once we locate it here in the fuse box, we'll go ahead and install the 15 amp fuse. Then we can replace the cover. To test our new four pole trailer connector, we'll take the test light ground clamp and put it on the white wire terminal. Testing the next terminal over, which will be our brown wire terminal, is our running light circuit. Then, we'll test the yellow wire terminal for the driver's side turn signal and brake. Then our last pin is going to be the green wire terminal for the passenger side turn signal and brake. Now that we know our four flat trailer connector works, we're ready to hit the road. That will do it. For our review and install of the tow-ready, custom fit vehicle wiring harness with four pole flat trailer connector, part number 118653 on our 2014 Nissan Murano. .

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Info for this part was:

Employee Jeff D
Installed by:
Jeff D
Employee Joshua S
Video Edited:
Joshua S
Employee Jacob T
Video Edited:
Jacob T
Employee Chris R
Video Edited:
Chris R
Employee Nicholas E
Test Fit:
Nicholas E
Employee Randy B
Test Fit:
Randy B
Employee Andrew S
Test Fit:
Andrew S
Employee Kathleen M
Video by:
Kathleen M

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