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

• Does T-One Harness Part # 118451 for 2008 GMC Acadia need Other Parts due to LED Tail Lights
  I spoke with one of our installers who has installed T-One harness part # 118451 on a 2008 GMC Acadia, and he said you should have no problems. If a T-One harness needs a converter, it will have one built in, but in this case it does not. We also have a video of this part being installed on a 2008 GMC Acadia and I will add a link to it below.
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• Troubleshooting Tekonsha T-One Trailer Harness Not Working on 2012 GMC Acadia
  The Tekonsha T-One Wiring Harness # 118451 that you ended up installing is the correct harness for your 2012 GMC Acadia and it will work whether or not you have the tow package so you made the right choice there. If you happen to have your trailer on hand, the first thing I recommend doing is simply hooking it up to the Acadia and plugging in your connectors. Sometimes those LED testers can be a little finicky so it's possible that the harness works perfectly and the tail lights on the...
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• Brake Controller Insatll-2012 GMC Acadia w/ Factory Tow Package
  If your 2012 GMC Acadia was equipped with the factory installed 7-way trailer connector at the rear of the vehicle, then installing a brake controller will be a plug-and-play process. You'll need the # 3026-P brake controller wiring harness, as you mentioned. Other than attaching the controller in its desired mounting location and plugging in the harness, there's nothing else that needs to be done. Install the # TK90160 Primus brake controller under the dash, to the right of the steering...
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• Recommended Wiring For A Trailer With Brakes For A 2011 GMC Acadia
  For your 2011 GMC Acadia, I recommend you start with the T-One Vehicle Wiring Harness with 4-Pole Flat Trailer Connector # 118451. This will give you a 4-way flat as you mentioned. Then you will need the Universal Installation Kit for Trailer Brake Controller # ETBC7. This kit will give you the wire, connectors, and circuit breakers you need to connect a brake controller to a 7-way for a trailer with brakes. For your brake controller, I recommend the Tekonsha Prodigy P3 Trailer Brake...
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• Does a GMC Acadia Need an Upgraded Fuse Panel to Add Trailer Wiring
  What I believe the dealer is suggesting is that if you wanted to add the tow package wiring, you would need that different fuse panel and some other components. This would then give you a 7-Way trailer connector at the back. If you do not want to add the towing package and just need a 4-Way, you can use the T-One Vehicle Wiring Harness, # 118451, without having to upgrade the fuse panel or anything else. This harness was made for those vehicles that do not have the tow package wiring....
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• Why Would Running Lights of Tekonsha Trailer Wiring Harness for 2011 Nissan Murano Stop Working
  Hey Chase, we see this pretty often when the pins on the trailer wiring connectors are seating fully. Try unplugging and replugging in all of the connections of the part # 118451 and also make sure the ground wire is connected to a clean metal surface and the problem should go away. Let me know if that works or not though.
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• Troubleshooting No Trailer Turn/Brake Signals with 2007 GMC Acadia
  I do agree that the wiring issue you are experiencing is somewhere on your Acadia. You mentioned that the Acadia didn't come with the tow package but it does have the trailer wiring and hitch. This means you likely have a T-Connector wiring harness installed such as the Tekonsha # 118451 that plugs into factory ports behind the tail lights. What I recommend doing is checking the white ground wire coming from the harness. Make sure this is still securely attached to a clean, bare metal...
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• Trailer Running Lights Will Not Work with 2009 GMC Acadia XLT with Tow Package
  First you are going to want to make sure that the running light circuit is working on the trailer connector on the 2009 GMC Acadia. Use a circuit tester such as # PTW2993 to test the running light circuit. If it is not working, then check the vehicle owner's manual for the fuse location for the tow package running lights to check/change it. Also check the owner's manual for any relays that might be needed for the tow package wiring. I do not recommend tapping into the running light wire...
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• Trailer Hitch and Wiring Recommendation for 2012 GMC Acadia
  The trailer hitch I recommend for your 2012 GMC Acadia is the Draw-Tite Class III Max Frame Round Tube Receiver # 75528 because it offers a greater towing capacity at an economical price for you. This hitch will also offer a more streamline look for your Acadia when it is exposed than the square and boxier framed Curt hitch. We have found that the original fascia cover on the 2012 models of the Acadia is not able to be reinstalled after an aftermarket hitch is installed. Other customers...
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• Trailer Wiring Harness Options for a 2011 GMC Acadia
  The Replacement Multi-Tow 7-Way and 4 Pole Trailer Connector, # 74682, will fit on your 2011 GMC Acadia if it came with a factory installed 7-way trailer connector at the back of the vehicle. There will be a round plug going into the back of your factory 7-way connector that will mate with the round plug from the Multi-Tow harness. If your vehicle did not come with a factory installed 7-way, then you may have the round connector at the rear of your vehicle tucked in the spare tire or...
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• Difference Between Curt Wiring Harness # C56056 and the Tow Ready T-One Wiring Harness # 118451
  There really is no difference between the Curt T-Connector Wiring Harness, # C56056, and the Tow Ready T-One Wiring Harness, # 118451. They both provide the same function but are manufactured by two different companies.
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• Parts Needed to Add a 7-Way Trailer Connector to a 2012 GMC Acadia
  The short answer is that wiring harness # 118384 will not fit a 2012 GMC Acadia if it does not have the factory tow package. The harness is meant to plug in line with a factory 7-Way trailer connector. If your vehicle does not have the factory 7-Way then it will not fit. To add a 7-Way you will first need to add a 4-Way, # 118451. Then you can add a 7-Way by using 4 and 7-Way installation kit # ETBC7. I have included a couple of links that explain the ETBC7 installation. If you also need...
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• Wiring Brake Controller For 2009 GMC Acadia With No Plug-In Available
  If you have the factory tow package you will find four (possibly five) blunt cut wires under the left side of the instrument panel to the left of the steering column. You should test each of the wires by function using a circuit tester like part # PTW2992 since manufacturers can change wire color at any time. I spoke with my contact at Cequent and they told me what the wires would be like on your Acadia and how the brake controller should be wired. The red/black wire on the vehicle will...
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• Can Bumper Cover be Put Back On 2010 GMC Acadia After Installing Trailer Hitch e98863
  It is highly likely the bumper cover will be able to be put back on your 2010 GMC Acadia after installing the etrailer.com Trailer Hitch Receiver # e98863, though there are some occasions which it has not been able to. That said, it is rare the cover will not go back on, as I went through all of the customer reviews for this hitch and the Curt Trailer Hitch # 13424, and there was just one instance of a customer relaying they were unable to get the cover back on. All other mentions of...
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• Trailer Wiring Recommendation for a 2014 GMC Acadia
  For a trailer wiring kit confirmed to fit your 2014 GMC Acadia you would want the Tow Ready harness part # 118270. It will not require you to run a power wire up to the battery as it comes with fuses and relays to complete the circuits.
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• How to Install a Trailer Wiring Harness on a 2011 GMC Acadia
  The plug you are referring to in the photo will not be used to install a trailer connector on your 2011 GMC Acadia. The correct way to install a trailer connector on your Acadia would depend on if you have the factory tow package or not. This is an important distinction to make and in order to be sure you know exactly what you have, you will need to obtain your VIN and contact the manufacturer directly. If you do not have the factory tow package then the connections you will need to make...
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• Installing Brake Controller and 7-Way Wiring on 2012 GMC Acadia without Tow Package
  It can seem really random what vehicle manufacturers decide to include and exclude on vehicles without tow packages in terms of circuits they do install and those that aren't there. So you for your 2012 Acadia you have the brake controller power, ground, and stoplight circuit but basically everything else is non-existent. So what you are going to need to do is install the 4-way kit part # 118451 to give you the taillight circuits you'd then need to wire to your 7-way directly after cutting...
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• Will Adding a Trailer Hitch to a 2010 GMC Acadia Damage the Frame
  That's ludicrous, you can absolutely install a trailer hitch on a 2010 GMC Acadia without damaging the frame. The etrailer Trailer Hitch Receiver part # e98863 is what I recommend, it offers a bolt-on fit without any drilling or welding. It's covered under a lifetime warranty as well. It installs in the same manor as the factory hitch that would have come on the vehicle if equipped with the factory tow package from the factory. There isn't any sort of extra bracing on models with the factory...
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• Troubleshooting No Power On T-One Vehicle Wiring Harness with 4-Pole Flat Trailer Connector # 118451
  I would start checking fuses and relays on the power block in the engine bay. The cover should have a map or listing of all the fuses. Check all of the fuses that have anything to do with taillights or tow circuits. I have added a link to a wiring FAQ page that shows which pins should serve which function. Use the circuit tester like # PTW2993 to make sure everything is on the correct pins.
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• 4-Way and 7-Way Trailer Connector for 2010 GMC Acadia
  I have a solution for you, and you will not need to cut into any wires. If you do not have a factory tow package on your 2010 GMC Acadia, you will first need to install a 4-way wiring harness. I recommend the Tow Ready T-One Vehicle Wiring Harness # 118451. This wiring harness will plug directly into the back of your taillights, into your vehicle's current wiring system. I have attached an installation video of this harness on a 2011 GMC Acadia. The wiring harness has a 4-way flat connector,...
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• Parts Needed to Install a Brake Controller on a 2011 GMC Acadia without a Tow Package
  You can hardwire the brake controller to your 2011 GMC Acadia. If you do not have one already you will need a 4-way at the rear of your vehicle. For a 4-way I would recommend you get a Tow Ready Custom Fit Vehicle Wiring Harness # 118451. I attached installation instructions and an installation video for this product for you to check out also. Now to convert your 4-way to a 7-way you will need a Brake Controller Installation Kit # ETBC7. This comes with everything to hardwire your brake...
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• Troubleshooting Running Lights Not Working On Two Trailers Towed by a 2006 Jeep Commander
  This could definitely be a ground problem. Without a proper ground, the circuit cannot be completed which can cause light failure and/or malfunction. You will also want to make sure you are using the correct wiring harness. For a 2006 Jeep Commander with no factory package, you will need to use Tow Ready Custom Fit Vehicle Wiring, # 118408, instructions linked below. With a tow package, you would use Tow Ready Custom Fit Vehicle Wiring, # 118381. I have included a link to the installation...
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• Troubleshooting Left Stop/Turn Signals on Trailer Towed by 2007 GMC Acadia
  You have already started the troubleshooting process to find the cause for your trailer's left-side turn and brake lights not working. Since another vehicle has no issue with this trailer this does tend to suggest that the issue is on the Acadia. Since both 4-pole and 7-way trailer wiring setups combined the left stop and turn signals onto one wire, typically a yellow one, what I suggest is that you start a close inspection of this circuit/wire at the trailer connector itself. You can...
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• Tail Lights on 2008 GMC Acadia Stop Working when Trailer is Connected
  Let's start with the easy stuff. Make sure the white ground wire on harness # 118451 is attached to a clean bare metal surface on your 2008 GMC Acadia. There can be no coating or paint and it works best if the wire is grounded by itself. If that doesn't help then what is probably going on is the trailer lights draw more power than the vehicle wiring system can handle. You can test this by removing the connections to some of the lights. Then, if everything else starts working, including...
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