T-One Vehicle Wiring Harness with 4-Pole Flat Trailer Connector

See what our Experts say about this Tekonsha Custom Fit Vehicle Wiring

• Wiring Harness w/ a 4-Flat Vehicle Connector for a 2022 GMC Terrain
  For your 2022 GMC Terrain without the factory tow package you will want the Tekonsha T-One Vehicle Wiring Harness with 4-Pole Flat Trailer Connector item # 118764. This custom-fit T-One connector plugs into your Terrain's wiring harness behind the rear tail lights. It provides you with a 4-flat vehicle connector to control your trailer's lighting functions.
  view full answer...
• Best Trailer Hitch Receiver for 2020 GMC Terrain
  The best trailer hitch for your 2020 GMC Terrain is the Draw-Tite Max-Frame Trailer Hitch Receiver # 76028. This is the best for your GMC because it has the best ground and bumper clearances, and because it has a concealed crosstube which means you will only see the receiver portion of the hitch, which helps keeps your Terrain looking stellar. This hitch fits both the diesel and non-diesel models of 2020 GMC Terrain, and I have added a link to a video install for you of the Draw-Tite Hitch...
  view full answer...
  
• Troubleshooting 4-Way Wiring Relays Won't Install on 2018 GMC Terrain
  It sounds like you're installing the Tekonsha # 118285 on your 2018 GMC Terrain. This is designed for the factory tow package. Since your relays don't snap into the K1 and K3 positions it sounds like the terminals are missing from the relay cavity. This means you need the T-One Vehicle Wiring Harness # 118764 instead. This wiring harness is designed for the Terrain without the factory tow package, and no relays are required.
  view full answer...
• How To Tell If a 2020 GMC Terrain Has the Factory Tow Package for Trailer Wiring
  In order to determine if a 2020 GMC Terrain has the factory tow package you will need to take a look in the rear fuse box on the driver side of the vehicle. In the fuse box there will be two locations you need to check, K2 and K3 which are for the trailer lights. These slots should be empty but what we are looking for is silver terminals inside each of the holes for the prongs on the relay. If there are silver terminals then you have the factory tow package but if not then you do not have...
  view full answer...
  
• Are Extra Relays or Fuses Needed to Use Curt Trailer Wiring Harness on 2020 GMC Terrain
  I can understand how the wording could be confusing on whether or not the Curt # C94FR (56429) will work on your 2020 GMC Terrain, but I can confirm that it will indeed work for you without needing to install any extra fuses or relays on the vehicle. The "with tow pacakge" selection on our site, refers to having the factory harness behind center of the rear bumper, like you mentioned having. According to my contact at Curt, this is present on all 2020 GMC Terrains, which is why they do...
  view full answer...
• If There Is Tow Package Port On 2018 GMC Terrain Can You Use Trailer Wiring for Factory Tow Package
  In regards to a 2018 GMC Terrain, not all models with the tow package port will actually have the tow package wiring. In other words, the port may be present but the wires are not run from this to the fuse block therefore the port is inoperable even with the relays handy. The best way to tell is by calling the dealer but if there are actual contacts/terminals in the relay locations assume they are not already installed then you can use the factory tow package port on the rear. The Curt...
  view full answer...
• No Relays Found When Installing Curt Wiring for Factory Tow Package on 2019 GMC Terrain
  The Curt Vehicle Wiring Harness # C94FR that you referenced is supposed to be used if your 2019 GMC Terrain came with the factory tow package. If those fuse locations are empty, then it sounds like you don't have the factory tow package and you need the T-One Vehicle Wiring Harness # 118764 instead which tees in behind your tail lights and doesn't require any relays. If your Terrain is supposed to have the tow package, then you should have metal contacts where those relays install. Since...
  view full answer...
• Which T-One Wiring Harness for a 2020 GMC Terrain
  Both Tekonsha T-One wiring harnesses will fit a 2020 GMC Terrain but it's based on whether or not you have the tow package on your vehicle as opposed to AWD vs FWD. With Factory Tow Package - # C94FR Without Factory Tow Package - # 118764 If you aren't sure if your Terrain has the tow package you can call your local GM dealer with your VIN and they can clarify this for you. I've also attached installation videos for both wiring harnesses on a 2020 Terrain for you to check out.
  view full answer...
  
• Comparing the T-One Vehicle Wiring Harnesses for a 2018 GMC Terrain
  There are two types of trailer wiring harnesses for a 2018 GMC Terrain, the Curt T-Connector Vehicle Wiring Harness with 4-Pole Flat Trailer Connectorm # C94FR which is for models with the factory tow package or the T-One Vehicle Wiring Harness part # 118764 which is for models without the factory tow package. It sounds like you have the one for models with the factory tow package but cannot find the factory plug so if that is the case then you will indeed need the other harness. I have...
  view full answer...
  
• Troubleshooting Harness That Works Only on LED Light Trailer but Not with Incandescent Light Trailer
  Ralph, It sounds like the Curt T-Connector Vehicle Wiring Harness with 4-Pole Flat Trailer Connector # C94FR is what you should be using for your 2019 GMC Terrain as it's designed for vehicles with a factory tow package. The # 118764, you mentioned, is designed for vehicles that do not have a factory tow package. LED lights draw only a fraction of the amperage when compared to incandescent lights, so what is very likely happening here is that you're dealing with a case of an insufficient...
  view full answer...
• Fit of Curt C94FR Trailer Wring Harness on 2019 GMC Terrain
  As confirmed by Curt, their # C94FR trailer wiring harness is a fit for 2018-present GMC Terrains equipped with the factory tow package. If your Terrain isn't equipped with the tow package, you'd instead need part # 118764. I've linked to install videos for both wiring harnesses.
  view full answer...
• Trailer Hitch Recommendation for 2020 GMC Terrain
  You have chosen wisely because I highly recommend the Draw-Tite Trailer Hitch # 76419 for your 2020 GMC Terrain (non-diesel). The reason this is the best hitch for you is because it has the highest capacities at 4,500 lbs towing and 675 lbs tongue weight, which speaks to it's strength and durability, and because it is the only hitch rated for use with a weight distribution system, which is something people use regularly when towing. To add trailer wiring to power your trailer lights you...
  view full answer...
• Recommended Trailer Hitch Receiver for Towing With 2022 GMC Terrain SLE
  For your 2022 GMC Terrain SLE I recommend the Curt Trailer Hitch Receiver # C77FR. This is a Class III hitch with a maximum gross trailer weight of 4,500 lbs and tongue weight of 675 lbs. It features a 2" receiver and a concealed cross tube so you will only see the receiver hanging down under the rear bumper. This hitch has a gloss black powder coat finish and a limited lifetime warranty. For wiring, the most reliable wiring harness is the Tekonsha T-One Vehicle Wiring Harness # 118764....
  view full answer...
• Curt or Draw-Tite Class II Trailer Hitch for 2020 GMC Terrain
  Between the Curt Trailer Hitch Receiver # C98CR and Draw-Tite Trailer Hitch Receiver # 36642 that fit your 2020 GMC Terrain, I would go with the Curt Trailer Hitch Receiver # C98CR These are very similar hitches, but the deciding factor here is that the Curt does have the significantly higher tongue weight capacity, 525 lbs vs. 350 lbs for the Draw-Tite. While this may not come into play often, it certainly can make a difference if you need to carry heavier cargo on a cargo carrier, for...
  view full answer...
• Recommended Wiring Harness For 2018 GMC Terrain Without Towing Package
  If you do not have a towing package you will not have the locations for the relays in the fuse box that come with the Curt T-connector wiring harness part # C56375 or the Curt wiring harness part # C94FR because they are designed for the 2018 GMC Terrain with factory tow package. If you do not have the factory tow package you need the wiring harness with the converter box and in-line fuse holder part # 118764. Without the in-line fuse and converter box the wiring harness could potentially...
  view full answer...
• Recommended Trailer Hitch for a 2020 GMC Terrain
  The trailer hitch that I recommend for a 2020 GMC Terrain is the Draw-Tite Max-Frame Trailer Hitch Receiver part # 76419 because it has a hidden design which means you won't see the bulky, unsightly cross tube from the rear of the vehicle so you won't take away from its aesthetics. I have attached a photo of this clean look for you as well. In addition to aesthetics, the hidden design makes for the best ground clearance. If you will be towing a trailer then you'll also need a trailer wiring...
  view full answer...
  
• Parts Needed To Install Redarc Tow-Pro Elite Trailer Brake Controller On 2018 GMC Terrain
  In order to install the Redarc Tow-Pro Elite Trailer Brake Controller part # RED44FR on a 2018 GMC Terrain without tow package, you will first need the T-One Vehicle Wiring Harness with 4-Pole Flat Trailer Connector part # 118764. Then you can convert this to a 7-way using the 4 to 7-Way with 4-Way Adapter part # ETBC7. This will be all that is required.
  view full answer...
• What Is The Most Hidden Trailer Hitch Receiver For A 2021 GMC Terrain?
  Both the Curt Trailer Hitch Receiver # C77FR and Draw-Tite Trailer Hitch Receiver # 76419 for your 2021 GMC Terrain will be tucked up under your bumper the exact same amount, and give the same roughly 10" of ground clearance. With that said I recommend going with the Draw-Tite # 76419 due to it being a bit easier to install since it does not require you to enlarge any holes on your vehicle like the # C77FR. This hitch has a 675lb tongue weight rating, and 4500lb trailer weight rating making...
  view full answer...
• Does Hitch Install on 2019 GMC Terrain Require Dropping Exhaust
  The exhaust of your 2019 GMC Terrain does not need to be lowered to install the etrailer.com hitch part # e98904 that you referenced. While we don't have a hitch for your vehicle that has a 4-way mounting bracket we do have other solutions like the 4-way bracket # 18140 and # 18144. This will wrap around the hitch tube and give you a bracket like you are wanting. For a 4-way then you'd want the part # 118764 which is a custom fit kit for your 2019 GMC Terrain. If you wanted to do some...
  view full answer...
• Components Needed To Install A Brake Controller On A 2022 GMC Terrain
  Yes, The Redarc Tow-Pro Elite Trailer Brake Controller # RED44FR will work just fine with your 2022 GMC Terrain. Before you install # RED44FR, you will need to install a 4-pole trailer connector # 118764 if not currently equipped. After the 4-pole is installed, you will need to also install a 7-way # ETBC7. After all those components are installed, you can install # RED44FR on your 2022 Terrain.
  view full answer...
• Wiring Harness for a 2022 GMC Terrain w/ out the Factory Towing Package
  Since your 2022 GMC Terrain does not have the factory tow package you will want the Tekonsha T-One Vehicle Wiring Harness with 4-Pole Flat Trailer Connector item # 118764. This custom-fit T-One connector plugs into your Terrain's wiring harness, which is located behind the driver's-side and passenger's-side tail lights. I have linked an installation video below. I can also confirm that the etrailer Trailer Hitch Receiver item # e59ZR does fit your Terrain. It is custom fit and bolts directly...
  view full answer...
• Recommended Hitch for a 2018 GMC Terrain
  I have a hitch for your 2018 GMC Terrain but there are no options to mount it in the stock location behind the rear fascia. Instead you will want the etrailer Hitch item # e59ZR. This hitch is custom fit and bolts to your GMC with included hardware. I really like the etrailer hitch because it because it has a matte black finish which offers superior rust protection and blends in better beneath your Terrain than one with a glossy finish. This is a class III hitch with a 2" receiver. It...
  view full answer...
  
• Hitch for my 2020 GMC Terrain with the Furthest Rear Pin Hole Location
  Of the hitches available for the 2020 GMC Terrain the Curt Trailer Hitch Receiver part # C13307 has the furthest rearward pin hole location giving you the best chance for getting the tailgate open with your bike rack when you need to. The pin hole is 4" from the rear edge of the bumper Versus the DrawTite part # 76419 which is at 5". I have included a video for you of the installation process to check out. If you need wiring for towing a trailer the Curt T-Connector Vehicle Wiring Harness...
  view full answer...
• Wiring Harness for 2019 GMC Terrain Without Factory Tow Package
  There is a wiring harness for your 2019 GMC Terrain, though as of this writing (August 2019) there is not an option from Curt. Instead you will need the T-One Vehicle Wiring Harness with 4-Pole Flat Trailer Connector # 118764. This is made by Tekonsha which is regarded by many as having the most reliable wiring harnesses in the industry so you will be getting a great product. If you are looking to tow you can add a trailer hitch with the Draw-Tite Trailer Hitch Receiver # 76419 for a NON-diesel...
  view full answer...

Do you have a question about this Custom Fit Vehicle Wiring?