You will need the relay kit. The 7 pin has brakes and house power connectors, so you can run accessories up to it's max rating, which I believe is 20 amps. For basic lighting only, all you need is the 4 pin harness, which only uses one of the frame-mounted sockets.
I got this, and can run basically anything.

Amazon.com

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If i just want to add a 4flat connector do i need the relays?

 

The factory hitch and wiring isn’t that much more and you’ll never have an issue. Nissans don’t take well to having their wiring messed with. If you’re here long enough you’ll see it is a real issue.

Clint

 

Thread bump, but hopefully the route I took will help someone else.



After trying the Draw-Tite 75282, I would also definitely recommend the OEM hitch. The vertical plates on the Draw-Tite were welded at the wrong angle (think toe-in if they were wheels) so I couldn't get the two forward-most bolt holes to line up to the weldnuts in the frame.

After reading reviews on Amazon and E-Trailer, it seems to be a common occurrence. And not many folks have the capability to modify what appeared to be 3/16" plate. I do, but I figured something purpose-made would be a literal bolt-on job, otherwise I would've made my own and gotten it certified at Eckhart (local trailer hitch place), so I returned the Draw-Tite and got the OEM one.

Not only did the OEM one fit perfectly, but it included:

• Nicer serrated, flange-head, pilot-point bolts instead of generic hex bolts with flat washers and lock washers.
• Supplemental horizontal brackets, meaning a total of ten bolts hold the hitch in place instead of just six.
• Trailer hitch plug. I didn't need it, but it was a nice touch.

I would suggest OEM wiring and hitch or this connector: https://www.oreillyauto.com/detail/...ing-solutions-trailer-wire-harness/hop1/43534

I’d probably buy this for an additional $40 and save/sell or discard the 4-way that comes with it. That’s not much worse than buying the Nissan kit for the $70 or $80 that it costs.

CURT 56225 Vehicle-Side Custom 4-Pin Trailer Wiring Harness, Fits Select Nissan Frontier, Pathfinder, Xterra, Suzuki Equator , Black https://a.co/d/buGlqwS

I went with the Hopkins 43534 connector and the Curt 56225 wiring kit. I installed the Hopkins in the bumper to the left side of the license plate. I didn't need the 4-way that the Curt 56225 included since I used the Hopkins connector, but I did need the relays in the Curt kit.

Without the relays you lights won’t work, when people buy aftermarket to save money they find out why they saved as they still need to go buy the relays and the. Add it up and you saved $0 plus you’re angry by then.

Specifically, the taillights won't work, at least on my '19. Without the relays I still had brake lights and turn signals on both the 4-way and 7-way.

There are plenty here who drilled their bumper after they removed the attached bracket as it looks way better and can’t get bent up.

I cut the 7-way bracket off the OEM hitch, but only the part that hangs down. I just zipped it off with my $10 Harbor Freight angle grinder with cutoff disc, then primed and painted the bare metal edge. I figure I'd leave the rest of the bracket in case I want to bolt something else to it in the future, and because that part isn't visible anyway. For now it is a nice mini skid plate.

 

I would suggest OEM wiring and hitch or this connector: https://www.oreillyauto.com/detail/...r-harness/443b5cb17d8c/hopkins-towing-solutions-trailer-wire-harness/hop1/43534

Reason being the other aftermarket brands seem to always have the wiring wrong for the trailer brake and 12V aux, which means power goes to the trailer brakes and the first time you tow with a trailer with brakes the power applies and locks the wheels. That is not a problem with OEM harnesses and is not a problem with the Hopkins plug. OEM is nice but I don't like where it mounts on the trailer hitch, it's super low (which is why the P4X didn't come with a trailer hitch since it's the offroad model). I also don't like the OEM only having a 7 way meaning for all the 4 way use I need, I had to use an adapter. I got the Hopkins and mounted it in the bumper.

 

I plan to install a class 3 which has a towing capacity of 5000 lbs. The only thing I plan to tow would be maybe a small motorcycle utility trailer, maybe small uhaul type trailers which I think are fitted with 4 pin connectors. Maybe a small boat trailer. In Texas, trailers aren't required to have electric brakes unless they are greater than 4500 lbs. The hitch is only rated for 5000 lbs max so I really don't know that I would need the round 7 pin setup. I guess having both would be ideal but may not ever need the 7 pin.

From what I understand, if I turn the headlights on and crawl under the truck with a multimeter and check the white connector for voltage on the pin closest to the bumper and if I have voltage then the truck has prewired towing package and I won't need the relay harness kit up front behind the kick panel, for the 4 pin setup type. Does that sound right?

 

Brakes may not legally be required on trailers under 4.5K - but on anything over approx. 2K, having them anyway is a good thing.

 

It’s foolish to think the truck can stop all that weight that it wasn’t built for. Add a controller and buy a trailer with brakes, in a collision the deductibles alone would cost more than the initial buy in and your truck still has to be repaired or replaced.

Clint

 

I purchased the OEM wiring harness and hitch directly from Nissan. I installed the harness on the bumper next to the license plate as many members from this forum have done so.
Trailer Tow Harness (7-Pin) Part Number: 999T8-BR020

 

Was it necessary to install a relay harness on the passenger side, behind the kick panel? Yours is a 2019? Appreciate it.

 

You gotta add the relays by the foot panel.

 

Ok, I'll just go with the 7 pin hookup with the extra relay harness for foot panel and if I need a 4 pin connection then I'll just get an adapter plugin from 7 pin to the 4 pin. appreciate it, no sense trying to take shortcut to save a few pennies.

 

Yeah, I'm having trouble finding someone that sells just the relay harness by itself, etrailer does not sell just the relay harness. But sure appreciate your advice. I'll keep looking. O'Reilly has the dual plug/harness locally $39.99

 

I’d probably buy this for an additional $40 and save/sell or discard the 4-way that comes with it. That’s not much worse than buying the Nissan kit for the $70 or $80 that it costs.

CURT 56225 Vehicle-Side Custom 4-Pin Trailer Wiring Harness, Fits Select Nissan Frontier, Pathfinder, Xterra, Suzuki Equator , Black https://a.co/d/buGlqwS

 

That's actually a pretty good price and will probably go that route. Appreciate it

 

If you go the Hopkins route and mount it in the bumper, I believe you’ll need a 2” hole saw. I used 2-1/8” but there was a decent amount of wiggle room. I would test a 2” in a block of wood and if it fits the plug, then it’ll work on the bumper. The main benefit of
The smaller hole being that your screw holes don’t have to be as precise. I could move mine enough that I could expose the hole and the paint on the edge of the hole that I did to minimize rust. So I had to install my screws just perfect. Make sure to paint the hole.

If you go OEM connector, you need a 2-1/8 hole and you have to trim the nubs off the connector so it’ll fit through the hole. You also have to unplug the harness and undo the harness casing to get it through the hole, then reassemble on the backside behind the bumper once done. That’s all easy though.

 

I wasn't sure if a hole saw would work on metal. I've got some but have always used them on wood.

 

There’s only cutting plastic bumper to install factory tow hitch. I also got factory wiring. Completely plug-n-play. Had it done in a couple hours.

Factory Receiver Hitch Install

I looked for a thread on this but couldn't find one, so if it's out there, go ahead and flame me. I purchased a 2022 Pro-4X base, no packages. It had the tow/haul feature and all the wiring but no receiver hitch. The dealer wanted $850 to put it in so I did it myself. It ended up costing me...

www.clubfrontier.org

View attachment 358917

 

I did a Draw Tite hitch off Amazon and the factory wiring harness kit from Nissan. Really easy to cut out the plug in the plastic bumper using a box cutter that I heat up with a lighter.

 

I was going to put a receiver hitch on my 2010 LE King Cab, but ended up putting if off then trading it in on the 2016 SV CC, which came with one. I looked underneath the rear and the LE was equipped with a plug for trailer wiring so you shouldn't have any issues putting in a wiring harness. I'd advise setting up the 7-pin and getting an adapter (about $15) for use with 4-pin trailers. That covers you for anything you'd likely tow. By the way, the 2016 towed a U-Haul 12x6 box trailer (2000 pounds plus about 1500 pounds of model trains) just fine -- no overheating or straining.

 

Anyone have any wiring suggestion. I have no diagram. I would like to tap into the ground and reverse light power to add some reverse pods lights to my rack. Dual wiring a switch in the cab, but also want to tap a power source to turn on in reverse.
recommends and suggestions welcomed.
Perfect world, they could be turned on for me to see stuff on a trailer when loading. And also turn on when I am in reverse when backing up in the woods/dark and adding light for the reverese camera.

 

I put on a Reese bumper hitch, 3500 lbs max. trailer load should be plenty for my limited use. I used 4-1/2"x2 1/2" extra high strength bolts, black oxide, from McM.-C., gave the bolts and hitch some clear gloss after it was on, black primer on the bumper drilled holes. Also added the factory trailer wiring, thanks very much to forum member OrcaPatrol for a great write up on the wiring from a couple years ago.