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Toyota Tacoma Trailer Wiring

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Toyota Tacoma Trailer Wiring Harness

Make installing a trailer wiring harness on your Toyota Tacoma as easy as possible with a custom fit wiring harness from Draw-Tite, Curt, Pollak, Tow Ready, Bosal, or Hopkins. A custom kit will eliminate or reduce the need to cut and splice wires in your Toyota Tacoma while helping to protect sensitive electronics.




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Thank you for the great product, it was shipped quickly and was easy to install just as your instructions said. Thank You Ron

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Toyota Tacoma Custom Fit Vehicle Wiring Videos



Trailer Wiring Harness Installation - 2002 Toyota Tacoma

Alright on this 2002 Toyota Tacoma, we're going to install product number 118379 from Tow Ready. Alright, first thing we have to do is go ahead and remove the tail lights. Right now we'll go ahead and disconnect the tail light from the harness. Alright, we're doing the passenger's side, let's go over to the driver side and repeat the same process. Over here on the driver's side we'll go ahead and take our 4-pole wire and we'll strap it at the bottom, alright. And we'll do the same thing for the T-Connector with the red and green wire.



Trailer Wiring Harness Installation - 2008 Toyota Tacoma

Today we are working on a 2008 Toyota Tacoma. We will be installing Tow Ready T-one connector part number 118496. Our first step will be to lower the tailgate. This will expose the mounting screws so that we can remove the rear taillight. They will be identical on the passenger side also. Let us go ahead and do that now. With our mounting screws removed, we can go ahead and remove the taillight. We will just work it back and forth until it comes free from its fasteners. With the taillight removed, you can see the connection here for our new Tow Ready connector. So we will depress the locking tab here on the backside of the connector and separate the two connection points. Once we disconnect the two connection points, the taillight lens will be free of the vehicle. We will take our yellow wire connector. It will match the manufacturer connection and we can plug them inline. Once it snaps in place, we can then go back to the vehicle connector on the other side and snap it into place. 1:00



Trailer Wiring Harness Installation - 2006 Toyota Tacoma

Today on this 2006 Toyota Tacoma we are going to be installing wiring harness part number 118496. First go ahead and lower the tailgate. Starting over here on the driver side, if you look on the inboard side of the bed, you can see we have a screw at the top and a screw here at the bottom. We need to go ahead and remove those to remove the taillight. With those two screws removed, we just want to take and kind of gently rock the taillight assembly back and forth. With the taillight pulled off, if you look on the backside here, you can see the main connector and that is the connector we are going to separate and plug our harness inline to. If you look towards the midline of the connector, you can see there is a little push button right there. If we press that in and pull away, we can separate the two pieces. I am just going to go ahead and set the taillight off to the side for a second. 0:50



Trailer Wiring Harness Installation- 2007 Toyota Tacoma

Today on this 2007 Toyota Tacoma we are going to install part number 118496 from Tow Ready. First thing we need to do is remove the two tail lights. There are three screws here, here, and here we are going to have to remove. You should be able to pull it back a little bit, there you go. Alright, now this is our wiring connection right here. We are going to push that tab down and pull it apart. Okay, we are done with the drivers side, we are going to do the same thing on the passengers side. 0:39



Trailer Wiring Harness Installation - 2000 Toyota Tacoma

This part number will fit 1995-1/2 - 2004 Toyota Tacomas and 1985-1995 Toyota pickups. The first steps involved is taking off the taillight assemblies. Well put them off to the side and then run our wiring inside. We will start on the drivers side first and work our way to the passengers side. Well disconnect the taillight by unplugging this electrical plug here. We will set the taillight assembly off to the side. What were going to do now is install the left hand part of the harness. Were going to follow this harness down through the body and follow that route and we will come back with this part with the yellow wire back up the same way. We will T it off here and well make a couple more connections. Now we will take our ground wire and run it the same way, we will overlap it and ground it to this piece of steel here.





Toyota Tacoma Custom Fit Vehicle Wiring Questions and Answers


  • Trailer Wiring Recommendation for a 2014 Chevy Traverse
  • For trailer wiring for your 2014 Chevy Traverse you would want the Tow Ready Wiring Harness part # 118270. If you need a hitch you would want the Draw Tite hitch part # 75528. For ball mounts I recommend the etrailer Ball Mount Kit # 989900. It comes with 2 ball mounts, 2 balls, a hitch pin with clip, and a carrying bag.
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  • Replacement 7-Way Recommendation for a 2006 Toyota Tacoma with Factory 7-Way
  • I have a solution for you, but it will require a little wiring and it is not the Trailer Wiring Harness part # 20137. There currently isn't a plug and play replacement 7-way available for your 2006 Toyota Tacoma so the best recommendation I can make would be to get the 7-Way Prewired Car Connector part # 20023. You will need to remove your current 7-way and bracket and cut the wires from the harness and wire them by function to the wires of the # 20023. I attached a picture that shows...
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  • Multi-Plug T-One Connector Assembly Recommendation and Installation for a 2002 Dodge Dakota
  • I attached a link to the installation instructions for the Multi-Plug T-One Connector Assembly # 20135, but installation is pretty simple as the old connector will unplug and this one will plug in it's place on your 2002 Dodge Dakota.
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  • What Parts Needed to Equip 2014 Toyota Tacoma to Tow Trailer With Electric Brakes
  • The items needed to tow a trailer with electric brakes include the hitch, ball mount and hitch ball (that you already have), wiring harness, and brake controller with install kit. The linked articles on towing and brake controllers will give you some useful detail on these items and on towing techniques. For a hitch I suggest the Curt 2-inch Class III hitch # 13323; this will fit both X-Runner and non-X-Runner models. The installation instructions are attached along with a video and...
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  • Installation Instructions for the Curt Wiring Harness # C56175
  • I attached a link to the installation instructions for the Curt Wiring Harness part # C56175 that you referenced just to the right.
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  • Replacement 7-Way Connector On 2007 Toyota Tacoma With Factory 7-Way
  • Since the 7-way connector on your 2007 Toyota Tacoma has been damaged, you can use the Tow Ready Replacement Multi-Tow 7-Way & 4 Pole Trailer Connector, part # 20119. This will give you a 7-way and 4-way connector on the back of your truck. I have attached a photo that shows what a typical connection would look like under your truck. To replace your existing connector on the back of your truck you would simply disconnect the connector from the vehicle wiring connector and install the #...
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  • How Does Curt Trailer Wiring Harness Install on a 2007 Toyota Tacoma
  • Curt trailer wiring harness # C56513 plugs in line with the tail light wiring on your 2007 Toyota Tacoma. We do not currently have a video of this particular harness being installed but I have included a link to the installation instructions. The harness installs the same way as # 118496 and we do have videos for it. I have linked one on a 2007 Tacoma for you.
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  • Troubleshooting Brake Lights not Working on a Trailer Towed by a 1992 Toyota Tacoma
  • Yes, there is a way to test the converter box of the T-One Wiring Harness # 118379. Basically you need to use a circuit tester like our part # 3808 and test for voltage on the input side of the box. If there is voltage there and then there is no voltage on the output side of the converter box you know that the problem is internal to the box. Before you would replace the box you would want to fix the short that is on your trailer. Otherwise the new converter box would short out as well....
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  • Installing Pollak 7-and 4-Pole Trailer Connector # HM40975 on 2011 Toyota Tacoma
  • Since it sounds like your Tacoma already has a 4-pole in place, I would recommend the # HM40975-11998. As you mentioned, this is the same connector used OEM on late model Tundras, F150s, Ram Trucks and now, even the 2014 GM trucks. There are two ways you can install this. You can cut off the existing 4-pole and hardwire it to the 11998 pigtail, if cutting off the 4-pole does not bother you. The wiring harness would then wire to the pigtail as follows: Harness yellow wire connects...
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  • Will the Tow Ready Replacement 7-Way and 4-Way Trailer Connector Fit a 2012 Toyota Tacoma
  • The Tow Ready Custom Fit Replacement 7-Way and 4-Way Trailer Connector, # 20119, will fit your 2012 Toyota Tacoma if it came with a factory 7-way. This is a replacement for the OEM 7-way trailer connector for the Tacoma. If your Tacoma did not come with a factory installed 7-way trailer connector, then we will need to go a different route. If your truck does not have any trailer wiring installed, then you will first want to install a 4-way flat trailer connector. For this, I recommend...
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  • Is the Tow Ready Replacement 7-Way Confirmed to fit a 2012 Toyota Tacoma
  • The Tow Ready Replacement 7-way part # 20119 that you referenced has been confirmed to fit your 2012 Toyota Tacoma as long as you had a factory 7-way.
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  • Troubleshooting 4-Way Installation With Turn Signal and Brake Lights Not Working 2010 Toyota Tacoma
  • With a plug-in harness on a 2010 Toyota Tacoma there are only a handful of possibilities and with that I can briefly go over them. I have also attached a FAQ article that gives troubleshooting tips when installing a 4-flat. Before starting the testing process, disconnect the trailer from your truck. The testing procedure requires a circuit tester like Quickee # 3808 to verify you have voltage running through the circuits. In the picture attached, I have the test locations (spots)...
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  • Installing T-One Connector # 118496 to Provide Trailer Wiring Harness on 2005 Toyota Tacoma
  • The # 118496 will plug inline with the vehicle wiring harnesses feeding each tail light assembly. The factory harness will need to be unplugged directly behind each taillight assembly, and the T-One connector plugged inline. You will need to remove each taillight assembly as if you were changing a burned out bulb. You can see the procedure in the installation instructions or the install video I have linked you to.
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  • Trailer Wiring Harness Recommendations For a 2005 Toyota Tacoma
  • It sounds like you have an aftermarket trailer wiring harness. Whether it is aftermarket or factory, that clicking noise you hear and the trailer lights not working indicate that there is a problem internally with the converter and it will need to be replaced. There are several options and I have included a link to them for you. The Curt harness you have referenced, # C56513, is a fit but this harness has a 5-Way flat trailer connector. A 5-Way flat is most common on boat trailers that...
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  • Turn Signals on Trailer Do Not Work When Towed By a 2006 Toyota Tacoma
  • The first step that I would take to troubleshoot this issue is to test the 4-way connector on your 2006 Tacoma for proper function. This will tell us if the issue is on your Tacoma or on the trailer. First, make sure the new wiring harness is properly grounded. It should be connected to a clean, bare metal surface on the vehicle frame or to the negative terminal of the battery. If the ground connection looks fine, you will want to use a circuit tester like part # 40376 to test each...
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  • Dash Lights Flashing with Turn Signals Using Curt Trailer Wiring harnes # C55513
  • This sounds like a bad ground problem. Make sure that the wiring harness converter box is attached to a non-painted clean and corrosion free bare metal surface. Also make sure that the 4-Way on the vehicle and trailer sides are free of corrosion. To determine if there is something wrong in the converter box you will need a circuit tester like # 3808. You will need to test the wiring going into the converter first. If it is not correct then you know there is a problem with the vehicle...
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  • Where to Store the 4-Pole Connector on a 2012 Toyota Tacoma
  • A four-pole connector is the connector that gets connected to the trailer wiring from the tow vehicle. It is called a 4-pole connector because the connector has 4 poles that carry 4 different tail light circuits. Most people will store the 4-pole connector at the rear of there vehicle near the hitch. Check out the picture I attached. What I would recommend you do is get a 4-pole bracket like our No-Drill Mount Bracket # 18136 and route the 4-pole through that. Using this bracket will...
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  • Troubleshooting Lights Dimming When Brakes are Applied with Trailer Connected 2012 Toyota Tacoma
  • There are a couple issues you may be having. You may have a bad ground or short on your trailer wiring and when you hit the brakes the short causes an excessive drain on your vehicle battery and your lights dim. If you see the voltmeter on your dash dive when this happens then you know this is happening. You could have a weak battery or alternator, around here you can have those things tested at local car part stores. You may also just have too many lights on your trailer and there...
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  • Installation Instructions for the Tow Ready 4-Pole Harness for a 2010 Toyota Tacoma
  • Under the rear bumper, near the driver side of your 2010 Toyota Tacoma there will be a plug with a cap on it that you will remove and plug the 4-Pole Trailer Adapter # 118384 into. I attached installation instructions and video for this product for you to check out that shows you how to install it.
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  • Is Heavy Duty Flasher Needed for Trailer Turn Signals with Wiring Harness 118496, 2006 Toyota Tacoma
  • A heavy duty flasher is not needed. The trailer wiring harness # 118496 will operate the turn signals and other lights without issue provided the power draw from the lights does not exceed what the harness is rated for. As for the amperage rating you are correct. The instructions also state that the capacity is 7.5 amps total for tail lights and 2.1 amps per side for the brake and turn signals.
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  • Trailer Lights Do Not Work After Installing Wiring Harness 118379 on a 1999 Toyota Tacoma
  • There could possibly be a bad ground. First, check the white ground wire on the converter box for # 118379. It should be attached to a clean and corrosion free bare metal surface. Then use a circuit tester like # 3808 if needed to test the wires going into the converter box from the truck. If the signals are correct going in then test the pins on the 4-Way. If the signals are not coming through then that indicates a bad converter box and it will need to be replaced. If the signals are...
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  • Installing 7-Way Trailer Connector on 2007 Toyota Tacoma
  • The Hopkins Multi-Tow trailer connector you referenced will fit a 2003-2007 Tundra, but not a Tacoma. If your Tacoma does not already have a functional 4-pole trailer connector like part # 118496, one will need to be added. From there, you can use a 4-pole to 7-way adapter # 37185. If your trailer does not have brakes and you do not need an accessory 12-volt circuit to provide power for any trailer mounted accessories that might need it, this set-up would work great for you. If your...
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  • Troubleshooting a Trailer that Keeps Blowing Left Turn/Brake Lights
  • It sounds like there might be a short on the left turn/brake circuit of your trailer. That would explain why the bulb went out initially and then why it went out again after you changed the bulb. I would inspect the circuit starting at the trailer connector and go all the way back to the tail light looking for corrosion or exposed wire and fix as necessary. The other thing I would check is the ground of the tail light assembly, bad grounds can cause all sorts of bizarre behavior so I...
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  • Troubleshooting a Weak Right Turn Signal on a Trailer Towed by a 2010 Toyota Tacoma
  • What you described sounds exactly like a ground problem. Pretty much anytime there is bizarre tail light behavior its a ground issue somewhere. I would check the ground of the right light assembly to see if there is any obvious issues that need to be fixed like corrosion, or broken, loose wires. Chances are it is not the vehicle side of the trailer harness, but you could get a circuit tester like our # 3808 and test the circuits individually to rule them out. I attached a video on how...
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  • Replacement 7-Way and 4-Pole Trailer Connector for 2010 Toyota Tacoma with OEM 7-Way
  • According to Hopkins, their # HM43385 is compatible with the 2003-2007 Tundra, but not the Tacoma. Since you already have the OEM 7-way, and you are simply wanting to add a 4-pole, you could just use part # 118384. This is a T-connector that will plug inline with the factory harness that plugs into the rear of your 7-way. Installation would be simple. Unplug the factory harness from the rear of your existing connector, plug the 4-pole inline, and install a bracket like # 18144 for the...
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  • Trailer Wiring Harness for a 2011 Toyota Tacoma Access Cab
  • The definitive way to determine if a vehicle has a factory tow package or any other options is to have a dealer run the VIN number. Although if there is no 7-Way connector at the back of the truck, you most likely do not have a factory tow package. To install trailer wiring, you would need to use the custom fit vehicle wiring, # 118496. I have included links to the installation instructions and a video showing a typical installation. If you then wanted to add a 7-Way trailer connector,...
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  • Recommendation of Vehicle Wiring Harness For 2009 Toyota Tacoma
  • The Hopkins Vehicle Wiring Harness, part # 33355, you have referenced, will fit the 2009 Toyota Tacoma without the factory tow package. The similar Tow Ready wiring harness would be the Tow Ready Vehicle Wiring Harness, part # 118496, for the Tacoma without the factory tow package. Both of those wiring harnesses are recommended for your vehicle. We have more reviews on the Tow Ready wiring harness because we sell more of that model because of the lower price. Both of wiring harnesses are...
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  • Parts Needed to Add a 7-Way Trailer Connector to a 2008 Toyota Tacoma
  • If the 2008 Toyota Tacoma came with a factory 7-Way wiring harness, there is no replacement 7-Way available. If it came with a 4-Way wiring harness, you can use # 37185. You will need to hardwire the remaining 4 wires. White grounds to the trailer frame, blue connects to the blue wire of a brake controller, black goes to the positive battery terminal via a 40 amp circuit breaker, # PK54540, and the last wire connects to the reverse light circuit. Or use # ETBC7 which comes with everything...
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  • Recommended 4-Way to 5-Way Trailer Wiring Adapter for a 1995 Mastercraft Boat Trailer
  • What you need is the Adapter 4 Pole to 5 Pole Trailer Wiring Adapter, # 20036. The extra blue wire in the kit will get attached to a reverse light circuit on the towing vehicle. I have included a link to a video showing a typical installation. You may also need a circuit tester, # 3808, to find the correct wire.
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  • Troubleshooting No Power to 4-Way Trailer Wiring Harness # 118496, 2010 Toyota Tacoma
  • In order to determine if there is something wrong inside the converter box of T-One Connector, # 118496, you will need a circuit tester if you do not already have one, # 3808. With everything installed according to the instructions, linked for reference, have someone sit in the cab to operate the brakes, lights, and turn signals while you test the wires on the harness. First test the wires that go into the converter from the tail lights. If you do not get a signal then make sure the...
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  • How Does the 4-Pole Trailer Adapter # 118384 Install on a 2011 Toyota Tacoma
  • The connection point is located behind the factory installed 7-way trailer connector. You will simply unplug the connector that attaches to the back of your factory 7-way connector. I attached installation instructions for this product below for you to check out. The 4-pole trailer connector will be stowed under the vehicle close to the trailer hitch. A mounting bracket is recommended. For that I would recommend a Mounting Bracket 4-Pole Flat, part # 18144.
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  • How to Install A 7-Way Connector On A 2010 Ford F-150 With A 4-Way Flat Connector
  • To convert the 4-Way flat trailer connector on the back of your 2010 Ford F-150, I would recommend using a 4 to 7-Way adapter, like our part # 37185. You will plug the factory 4-Way into the back of the adapter and hardwire the remaining 4 wires. The white wire gets grounded to the vehicle frame. The blue wire gets connected to the electric brake controller output (blue wire on a brake controller). The black wire connects to the positive battery terminal with 10 gauge wire like # 10-1-1,...
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  • Tail Light Fuse Blows On 2000 Toyota Tacoma When Trailer Is Connected To The Trailer Hitch
  • Since it is blowing the fuses only when the trailer is connected to the hitch it is probably a short on the trailer wiring. You will want to start by testing the installation of the T-One Vehicle Wiring Harness, # 118379. Without the trailer hooked up you will need to use a circuit tester like the Quickee Circuit Tester, # 3808, and test each wire going into the black converter box on the T-One Vehicle Wiring Harness, # 118379, as its function is activated. With somebody to turn...
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  • Will the Tow Ready Custom Fit Trailer Wiring for the 2007 Toyota Tacoma Fit On an X-Runner Model
  • The Tow Ready Custom Fit Vehicle Wiring for the 2007 Toyota Tacoma, item # 118496, will provide a 4-Way connector at the rear of your 2007 Tacoma X-runner. There is no splicing or extra parts needed to install this harness, it simply plugs in-line with the tail light wiring and is routed to the rear bumper. You will need to attach the white ground wire to a clean rust and paint free chassis ground with the included self tapping screw. You may want to consider using a mounting bracket...
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  • Installation Method for a 2006 Toyota Tacoma Wiring Harness from Tow Ready Part 118496
  • It plugs inline with the connectors behind both the passenger and driver tail lights. I have added a link to the instructions below for you to review.
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  • What Wiring Should I use to Connect a 2007 Toyota Tacoma with a Trailer
  • The proper harness for a 2007 Toyota Tacoma is part # 118496. It is a T-One harness that will simply connect to the connectors behind the tail light. You will not have to do any splicing. Attach the ground and then it is plug-and-play. I have added a link to the part below, and a video showing the installation on a 2007 Toyota Tacoma .
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  • Is a Wiring Harness Mounting Bracket Included with Trailer Wiring for a 2009 Toyota Tacoma
  • To secure the wiring at the rear of your vehicle you can use the Mounting Bracket 4-Pole Flat, item # 18144, along with a No-Drill Mount Bracket, item # 18140 short, or # 18136 long. This keeps the connector secure at the rear of the vehicle and is a no drill application with the bracket. You could also use the Mag-Flat (TM) 4-Pole Mounting Magnet, item # 38095. to secure the connector at the rear of the vehicle. The Tow Ready Custom Fit Vehicle Wiring, item # 118496, does not come...
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  • Hitch, Wiring, Brake Controller, and Accessories for a 2010 Toyota Tacoma
  • For your 2010 Toyota Tacoma and hitch, # 13323, the hitch comes with everything you need to install it. Depending on what you want to tow or carry there are some basic accessories that you will need. A draw bar is a good idea if you plan on towing a trailer that has a coupler. Ball Mount, # 2923 will fit in the recommended hitch. Use with hitch ball, # 19247. I also recommend a locking hitch pin, which will deter theft, like the Trailer Hitch Receiver Lock, # 7683. You will also need...
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  • Trailer Wiring and 4-Pole to 7-Pole Adapter for a 2010 Toyota Tacoma
  • For your 2010 Toyota Tacoma, I recommend using the Tow Ready Custom Fit Vehicle Wiring, # 118496, and our electric brake controller installation kit, # ETBC7. These items will provide all of the wiring connectors for installation of a 4-Way and 7-Way RV connector at the back of your Tacoma. I have included the instructions and videos for the custom wiring, # 118496, and # ETBC7 kit, that should prove helpful. To install and wire the 7-Way connection, plug the 4-pole adapter coming...
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  • Will the Tow Ready T-1 Connector Work on a 2008 Toyota Tacoma X-Runner With LED Tail Lights
  • The problems you have experienced tend to indicate a wiring problem on the trailer itself. Since the current converter you have is shorted out, you should begin by troubleshooting your trailer wiring before installing a new converter. Failure to do so could result in shorting out your new converter. Start at the trailer connector, make sure it is not damaged or corroded. Trace each circuit back to its fixture, looking for pinched or broken wires. Check the wiring insulation for worn...
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  • Malfunction Camper Shell Third Brake light with 4-Pole Wiring Harness on a 2009 Toyota Tacoma
  • If you connected the cab stop light to the wires that go after the converter box to the 4-pole connector, that is why you are having a problem. The signal for that wire is going to a trailer light that does not have separate turn and stop bulbs, so your camper shell is getting both brake and turn signals. You will need to find a dedicated stop light wire in the tail light wiring harness on the Tacoma to activate the third brake light on your Leer cap. You may be able to use the red wire...
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  • What does the Black Converter Box Do on the 118379 Wiring Kit for a 2002 Toyota Tacoma Pickup
  • The converter box will convert your vehicles taillight system from a 5 wire system with the separate amber turn signals down to a 4 wire system which is needed to properly operate the trailers lighting system.
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  • Brake Controller and Wiring Parts, Installation Instructions and Video for a 1999 Toyota Tacoma
  • Here is what you need to get your Tacoma ready to tow. The T-1 trialer wiring harness, # 118379, a brake controller, # 90885, and the # ETBC6 brake controller 6 way install kit. The install kit contains everything needed to complete the install, including the 6 way connector and mounting bracket. We have detailed instructions for installation of the wiring harness and brake controller installation kit, and have videos for you to review. The brake controller install kit video shows a...
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