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Trailer Wiring Harness Installation - 2015 Nissan Murano

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How to Install a Trailer Wiring Harness on a 2015 Nissan Murano


Today on our 2015 Nissan Murano, we're going to review an install of the Curt Custom Fit 4-Pole Trailer Connector, part number C56267. Before we install it let's go and review our trailer wiring. Open up the rear hatch and spare tire cover. Take our 4-flat trailer connector wiring out, running it out over the vehicle threshold. However, stay away from the latch, as pinching it off in the latch can harm the wire, but the threshold seal is thick enough that it won't harm the wire. Then we'll close the rear hatch on the wiring. Once it's closed I'll pull out the wire necessary, so that we can run it down to our hitch or accessory.

Now once we're finished with our 4-flat trailer connector we'll simply open up the rear hatch, roll up our wiring, and store it with the spare tire, inside the vehicle, and out of any inclement weather. This is a standard 4-flat trailer connector. It's applicable in most situations, and will provide the vehicles running light, turn signal, and brake signals, from the vehicle to the trailer, so it duplicates, or mirrors, what the vehicle is doing. Here's what our custom fit wiring harness is going to look like right out of the package. Connecting to the driver's side tail light wiring circuit will be the yellow, red, and brown wire connector. Here we're going to pick up power from the manufacturers 12-volt supply.

Our white wire with the pre-attached ring terminal is our ground. Then on the passenger's side we're going to have a green wire connector. Going out to our trailer accessory it's going to be our 4-flat trailer connector. Tying it all together will be the black converter box, that transfers the signal from the vehicle to our 4-flat connector. Now let's go ahead and show you how to install it. To begin our install we need to remove the vehicles floor coverings over the spare tire, and cargo area.

We'll start here with the rear cargo mat, pull it out and set it aside. The center section here will raise up, we can the manufacturers little hook, and secure that out of the way, and we'll move to the corners. We can remove the top, or covering, to expose the storage containers underneath. Next, we're going to go ahead and remove the storage compartments here. On the passenger side we'll need to remove some of the spare tire tools, in order to get to the fasteners necessary. Then at the bottom there are two 00:02:50 fasteners securing it.

Once we pull those two fasteners out, we can go ahead and remove the storage compartment. Now we'll move over to the driver's side and repeat the same process. Underneath the storage container is the manufacturer's connector where we'll pull our 12-volt power supply from. We'll go ahead and use our utility knife, and cut the tape so we can free the connector. Also, here on the driver's side is going to be the manufacturer's tail light wiring harness. This is a larger white connector, and it's got some black tape securing it to the wiring harness. We'll go ahead and cut the black tape, so we can free it. Then we need to separate the two connectors. To separate the two connectors we'll press on the locking tab, and just simply pull them apart. We're now ready to go ahead and bring in our custom fit wiring harness. Our Curt wiring harness T-connector will match the manufacturer's connectors, and we can plug directly into the manufacturer's wiring harness. Our red wire here with the pre-installed fuse holder will be the wire we connect to the 12-volt power supply. Next, we'll take the green wire connector, and route it over to the passenger's side. As we route it, we're going to plan on keeping it underneath the rear threshold where it will be safe and secure. Once we move over to the passenger's side we'll do the same process of locating the tail light wiring connector, cutting it free and separating the two connectors. We can then take the green wire connector, we'll route it over and plug it into the manufacturer's wiring harness. With my connection made we'll go ahead and use the zip ties provided to secure the wiring as necessary, working our way back over to the driver's side. After I secure the wiring I'm going to go ahead and cut off the excess of the zip tie to clean up my install look. Next, we're going to mount the converter box. To mount our converter box we're going to use the two way adhesive supplied with our install kit. Remove one side of the adhesive, and attach it to the box. Then the other side, and attach it to the vehicle. When attaching it to the vehicle we're looking for a clean, flat surface, preferably sheet metal. Here, below the driver's side tail light assembly, is a perfect location. We'll firmly press it into place to get a good cohesive connection. Next, we'll take the white wire with our pre-attached ring terminal, and secure it to the body of the vehicle to create the ground for our converter box. We'll use a self-tapping screw, supplied with our install kit, to secure the ring terminal. When locating a spot to ground our ring terminal, and put our self-tapping screw in, I'm looking for an area where the sheet metal doubles up for a good security connection point. Now our ring terminal's secured. With all our connections made we need to install the fuse into the fuse holder. It's an inline fuse holder and protects our converter box. We use 10-amp fuse provided with our install kit. Go ahead and put the fuse into the fuse holder, cap on the fuse holder. We can then go ahead and secure the excess wiring using the zip ties provided as needed. Cut off the excess from our zip tie, and we're ready to install our interior trim components. Next, we're going to move to the engine compartment. Here next to the battery is the manufacturer's fuse box. We'll open the fuse box by pressing on the lid lock, and lift it up and out of the way. If we turn the lid over we can see the markings that indicate the fuse pin locations. Here in the lower right hand corner is indicated for towing. Then when we match that up to the fuse panel, we can see that it's got a 30-amp fuse already installed. If it did not have the 30-amp fuse installed, we would put in the 10-amp fuse provided with our install kit. Next, we'll go ahead and test our new 4-pole trailer connector. We can pull it out from underneath the rear storage compartment. Remove the cap, and using our test light we'll put the ground clamp of our test light on the white wire terminal. Then the brown wire terminal, which is next to the white wire, is going to be the running light circuit. The yellow light terminal will be the driver's side turn signal, and brake. Then the green wire terminal will be the passenger's side turn signal, and brake. Now we know our 4-flat trailer connector works, we're ready to hit the road. That will do it for our review and install of the Curt Custom Fit Trailer Wiring Harness with a 4-pole trailer connector, part number C56267, on our 2015 Nissan, Murano. .


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Info for this part was:

Employee Joshua S
Video by:
Joshua S
Employee Kathleen M
Video by:
Kathleen M
Employee Nicholas E
Test Fit:
Nicholas E
Employee Robert C
Test Fit:
Robert C
Employee Jacob T
Video Edited:
Jacob T
Employee Chris R
Video Edited:
Chris R

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