2025 where is the 2025 Tucson trailer wiring harness plug?
2025 Tucson Trailer Wiring Harness
Joe T
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25 Posts
Installed my Curt hitch this AM, and was able to do it by myself.
Backed my Tucson up on ramps, removed the plastic cover plate, and unhooked the passenger side rubber muffler clamp from the undercarriage to get a little more room.
Was able to lift the passenger side of the hitch up on top of the muffler that supported that end of hitch allowing me to get a bolt in the driver side and then got a bolt in the passenger side.
Only took about 30 minutes to install it (another 15 minutes or so of putting tools back, etc).
Found the grommet penetration for the OEM harness install per the instructions, while I was under there.
USPS now says the harness will be delivered on Monday so will post install pics next week.
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Backed my Tucson up on ramps, removed the plastic cover plate, and unhooked the passenger side rubber muffler clamp from the undercarriage to get a little more room.
Was able to lift the passenger side of the hitch up on top of the muffler that supported that end of hitch allowing me to get a bolt in the driver side and then got a bolt in the passenger side.
Only took about 30 minutes to install it (another 15 minutes or so of putting tools back, etc).
Found the grommet penetration for the OEM harness install per the instructions, while I was under there.
USPS now says the harness will be delivered on Monday so will post install pics next week.
Attachments
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25 Posts
Received OEM trailer harness/module today and installed it.
This is on a '25 SEL Hybrid. I didn't hurry, took about 45 minutes.
The OEM wire harness instruction PDF is solid enough for a successful install.
First thing is to disconnect the 12v connection on the passenger side.
Pull the weatherstrip back a little on the rear and up the left side to help in removing the Transverse panel and the left side panel.
The left panel is held in place by 3 screws and multiple plastic tong connections that aren't visible.
Need to go slow on pulling the Transverse panel out. It seemed like it wasn't going to come off but steady pressure and it did.
Slowly pull the left panel pack from the vertical rear part of it and also from the top of it. Can feel/hear the tongs disconnecting. I pulled mine back about 16" at the rear side and propped it open there..plenty of room to work inside.
I didn't use any wire ties inside the panel as there is a boatload of space in there and no moving parts.
It's all plug and play wire wise so no need to splice or pinhole any wires.
I did use wires ties to run the wire harness from the grommet to the hitch.
Everything goes back together easily and takes just a few minutes.
![Image]()
![Image]()
![Image]()
![Image]()
![Image]()
![Image]()
![Image]()
This is on a '25 SEL Hybrid. I didn't hurry, took about 45 minutes.
The OEM wire harness instruction PDF is solid enough for a successful install.
First thing is to disconnect the 12v connection on the passenger side.
Pull the weatherstrip back a little on the rear and up the left side to help in removing the Transverse panel and the left side panel.
The left panel is held in place by 3 screws and multiple plastic tong connections that aren't visible.
Need to go slow on pulling the Transverse panel out. It seemed like it wasn't going to come off but steady pressure and it did.
Slowly pull the left panel pack from the vertical rear part of it and also from the top of it. Can feel/hear the tongs disconnecting. I pulled mine back about 16" at the rear side and propped it open there..plenty of room to work inside.
I didn't use any wire ties inside the panel as there is a boatload of space in there and no moving parts.
It's all plug and play wire wise so no need to splice or pinhole any wires.
I did use wires ties to run the wire harness from the grommet to the hitch.
Everything goes back together easily and takes just a few minutes.
Attachments
Joined
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25 Posts
The Curt hitch instructions stated that part couldn't be reinstalled.
There's no room to reinstall it once the hitch is installed and the hitch can't be installed (I don't believe) if that cover is left in place.
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17 Posts
You have to pass wire by under ,the 4 pins plug dont pass by inside ,that's it , tanks
It’s an hour job and not too hard. Just follow the detailed instructions.
Thank you for sharing. This should be very helpful!
Is that the Hyundai wiring kit? I already installed my Curt hitch, and wasn't planning on wiring for lights, as I only plan to use it for my Hollywood Racks Ebike rack. After seeing your images, I may just install wiring, even if just to add lights to the bike rack.
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25 Posts
Yes, OEM kit. It's expensive, costs about $160 but worth it IMO since there is no pin holing wires or splicing.
I used Costco Auto to purchase my 2025 Tucson hybrid. After reviewing the service, I get a coupon for 50% off parts and service, up to $100 savings!
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These are great photos! I started to install mine but I had trouble removing the transverse panel so I took it to the dealer. Cost $250. I may have kept trying if I had been paying attention and saw your photos. I decided it would cost me a couple hundred bucks if I broke one of the panels trying to remove it, so I just ate the cost.
So there is a factory pre-wire for the lights on the 2025 Tucson? Most forums are saying there isn’t one. You found that it is hidden in the panel inside the cargo area? Is this correct? Is it then plug and play with an adapter like the one available from Curt?
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Yes, the 2025 has a factory hitch lights plug adapter installed. Don't know about the Curt wire harness, I used the OEM harness.
Same with me. I installed my own hitch, but took the OEM harness I purchased to my dealer to install. None of the fine pictures of the OEM harness installation (above) had been submitted by other owners at that point, or I would have installed it myself.
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17 Posts
Not all tucson quet the under plug , My tucson 2025 XRT in Qc Canada dont quet that plug I had to purchass the Hyundai harness $ 365.00 and fix it in the trunck left sire panel , WTF all to pay more I bouth 2 Curtt kits and I am , guetting 2 kits for notthing , BS hyundai did with that F,,,plug. 😁😡🤬🤬🤬
These pics are great jackkilleen, and I expect they will help immensely! I love all the markup you supplied, it's extremely clarifying.
For anyone looking, and like me couldn't readily find it, here is a link to the installation guide from OldManWinter's post on page 2 of this thread: https://www.hyundaiaccessories.com/admin_media_uploads/installationSheets/cwf67ac000.pdf
For anyone looking, and like me couldn't readily find it, here is a link to the installation guide from OldManWinter's post on page 2 of this thread: https://www.hyundaiaccessories.com/admin_media_uploads/installationSheets/cwf67ac000.pdf
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Hi, see attached...
Thank you!
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The work for Tucson arness from Hyundai you can se it on youtube you have to remove the back side in the trunk not all just a part ,dont brake it , you pass a cable by under beacaus it dont pass by inside the 4 pins plug dont pass , and after you follow the instructions , $ 365,00 in QC for it no work , good luck allof you . but I stay with my 2 plug in kits F...
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