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Trailer Wiring Harness Installation - 2006 Nissan Altima

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How to Install a Trailer Wiring Harness on a 2006 Nissan Altima

Today on this 2006 Nissan Altima we are going to install part number 119176 from Tow Ready. The first thing we need to do is get access to the trunk area of the vehicle. We need to pull back some of the interior components so we can get to the wiring. We removed the flooring material, now we are going to take off this panel right here. It is assembled along the top edge here but you can just pull on it and it should pop out. We will do the same thing with the plastic rivets here and here and get closer to the wiring. We can see where our main wire harness comes down through here and this goes on to the passenger side of the vehicle and this one goes straight to the driver side tail light. So we can get access to our wiring here and here. 00:49

The first thing we will start off is install the ground screw that way we will have something to test with also. Take the light tester and attach to that and then we will start testing our wires for function. Start with the running lights and then the turn signals and then the brake lights. Instead of having to pierce into the wires themselves we will go back inside the connector and do it that way. Now we will turn it off just to verify. That wire looks like a red with a blue stripe and a silver dot. We will attach the modulite to that wire and that will be the brown wire for the running lights. We will use a quick splice to make our wiring connections. Then we will check on the other side of the quick splice just to make sure we have got a good connection. We will do the same thing for the left turn signal now and these are a little bit heavier wires to deal with so we will make the connection on the this side. The left turn signal is going to be the all green wire so the left turn signal on the module is going to be yellow. 01:48

Next we will work on the right turn signal. There you go. It looks like the right turn signal is going to be green with a yellow stripe and a silver dot. We are going to connect that to the green wire on the modulite. The brake signal is going to be green with a yellow stripe and that will connect to red. Now we will take the white wire and run that to the ground that we made earlier. We will take the modulite and attach it to the sheet metal behind the carpeting. Take the 4-pole wire and pull that out towards the spare tire for now. Leave that alone and the last wire we have to deal with is the red wire and this gets 12 volt power supply straight from the battery. We are going to wire up to the front using part number 118151 to do that. To run the wire up to the battery we need to go outside the body of the vehicle so we are going to drill a hole about right here and we are going to install the grommet and we are going to wire through there up to the battery. We will take the thin gauge wire that comes with the 118151 kit and we will just push it through the grommet and we will just pull the length through. Lets make the connection to the red wire. The grommet is obviously big for the wire we need so we will take up the excess space with some sealant. 03:24

At this point we can assemble the interior components on the vehicle. When we run the wire up front towards the battery we want to keep away from anything moving such as the suspension components or anything hot like the exhaust. When you get to the engine compartment the same rules apply. We will take the wire and push it up into the engine compartment along the firewall and just make sure we do not route against anything moving or anything hot. Run the wire up to the battery here and go underneath the intake and zip tie off to one of the cables here and then we will take this and cut the wire short and we will install the fuse holder going to the positive side of the battery. We will take the fuse holder, cut it in half and we will install the ring terminal into one end and the butt connector in the other. What we are going to do is connect it to the positive post and attach the fuse holder and just tighten it back down. Then we will install the fuse and we are finished. We will tuck the fuse holder by the battery safe and out of the way. Remember when we hid the 4-pole wiring harness and the trunk panels for the tire, pull it out and what you can do is pull it outside and shut the trunk lid on it and then pull what you need out to the trailer. That way you do not have any more than you need hanging out plus when you are not using and it is stored safely inside from out of the elements. With that, that will finish it for our install of part number 119176 and part number 118151.

Info for this part was:

Employee Zack K
Video Edited:
Zack K
Employee Joshua S
Video Edited:
Joshua S
Employee Jacob T
Video Edited:
Jacob T
Employee Andrew K
Video by:
Andrew K
Employee Dustin K
Video by:
Dustin K
Employee Nicholas E
Test Fit:
Nicholas E
Employee David F
Test Fit:
David F
Employee Cole B
Installed by:
Cole B

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