Trailer Wiring Harness Kit For 16‑23 Toyota Tacoma All Styles
Model: 1186852016 - 2023 Toyota, Tacoma, All Styles
Direct Plug & Play Wiring Kit
| Part Number | 118685 |
| Brand | Tekonsha |
| Warranty | 1 Year |
| Installation Instructions |  |
Questions or Comments? Call 702-374-8999
Thank you for choosing Tekonsha, the most powerful name in trailer light wiring and brake control system. Our trailer wiring harness is vehicle specific, requires no splicing or cutting of the wires. Simply plug & play and your vehicle will be able to control trailers brake, turn and running lights. Trailer wiring kit comes with a 1 year warranty and everything necessary to install the trailer plug wiring. Tekonsha manufactures a wider range of different products for hooking up trailer lights to your Car Truck or SUV. T-One connectors work great with boat trailer wiring and utility trailer wiring. Typically those trailers will use the standard 4 flat plug which is what our T One connectors offer. If you have an RV Fifth Wheel or any other large type of trailer you will us a 7 pin trailer plug to control your electric trailer brakes. Tekonsha offers 7 pin trailer connector as well. Simply do a search above to see if there is a 7 wire trailer wiring available for hooking up your 7 way. If there is not you can use part number 85343 trailer wiring adapter to convert any 4-Flat into a 7-Way. In addition you will use part number 20506 which will include the rest of wiring needed for electric brake controls. You can also call us or email us any time and we will be able to provide information you need.
Partial list of fitment years:
16 17 18 19 20 21 22 23 2016 2017 2018 2019 2020 2021 2022 2023
$79 04 $112.03 29% OFF
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$112.03 $79 04
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Product Details
- Brand: Tekonsha
- Model: 118685
- UPC: 016118146103
- Includes: T-One T-Connector Custom Harness
Compatibility Chart
2016 - 2023 Toyota, Tacoma, All Styles
Direct Plug & Play Wiring Kit
| Part Number | 118685 |
| Brand | Tekonsha |
| Warranty | 1 Year |
| Installation Instructions | |
Questions or Comments? Call 702-374-8999
Thank you for choosing Tekonsha, the most powerful name in trailer light wiring and brake control system. Our trailer wiring harness is vehicle specific, requires no splicing or cutting of the wires. Simply plug & play and your vehicle will be able to control trailers brake, turn and running lights. Trailer wiring kit comes with a 1 year warranty and everything necessary to install the trailer plug wiring. Tekonsha manufactures a wider range of different products for hooking up trailer lights to your Car Truck or SUV. T-One connectors work great with boat trailer wiring and utility trailer wiring. Typically those trailers will use the standard 4 flat plug which is what our T One connectors offer. If you have an RV Fifth Wheel or any other large type of trailer you will us a 7 pin trailer plug to control your electric trailer brakes. Tekonsha offers 7 pin trailer connector as well. Simply do a search above to see if there is a 7 wire trailer wiring available for hooking up your 7 way. If there is not you can use part number 85343 trailer wiring adapter to convert any 4-Flat into a 7-Way. In addition you will use part number 20506 which will include the rest of wiring needed for electric brake controls. You can also call us or email us any time and we will be able to provide information you need.
Partial list of fitment years:
16 17 18 19 20 21 22 23 2016 2017 2018 2019 2020 2021 2022 2023
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Trailer Wiring Harness Kit For 16-23 Toyota Tacoma All Styles Install Notes
Installation Instructions for T-One® T-Connector for Toyota Tacoma
Part Numbers:
- 118685
Tools Required:
- Trim Panel Remover
- 10mm Socket & Ratchet or Wrench
- Wire Crimpers
- Wire Cutters
- Test Probe
- Drill (3/32” Drill Bit)
Step-by-Step Instructions:
-
Remove the Taillights:
- Open the tailgate and remove the vehicle’s taillights.
- Carefully pry the housings away from the vehicle, ensuring not to break the alignment tabs.
-
Connect the Driver-Side T-Connector:
- Separate the vehicle’s wiring connectors carefully, ensuring not to break the locking tabs.
- Locate the 3-pin housing that matches the T-One® Connector with the yellow and brown wire and lock into place. Ensure all connector surfaces are clean and free of dirt.
-
Route the Harness:
- Route the harness containing the red and green wire and the 4-flat down the opening behind the driver-side taillight.
- Route the 4-flat harness to the center of the vehicle and the red and green wire to the passenger side, routing it up through the opening behind the passenger-side taillight.
-
Connect the Passenger-Side T-Connector:
- Separate the vehicle’s wiring connectors on the passenger side, ensuring not to break the locking tabs.
- Connect the green wire with the 3-pin flat housing to the corresponding connectors.
- Connect the T-connector end with the red wire to the mating housings.
-
Ground the White Wire:
- Locate the ground stud in the driver-side taillight pocket.
- Secure the T-Connector’s ring terminal with the nut provided.
- Alternatively, locate a suitable grounding point near the adapter, clean the area of dirt and rustproofing, drill a 3/32” hole, and secure the white wire using the provided eyelet and screw.
Caution: Verify what is behind the surface before drilling to avoid damage or injury.
-
Mount the Black Box Module:
- Locate a flat surface in an out-of-the-way place and mount the T-Connector’s black box module to prevent damage or rattling.
Warning: Ensure the epoxy side of the module is pointed downward to prevent water buildup.
-
Route the Power Wire:
- Beginning from the front of the vehicle, route the black 12-gauge wire rearward along the frame rail, avoiding hot pipes, heat shields, the fuel tank, or other hazardous points.
-
Connect the Power Wire to the Battery:
- Disconnect the vehicle’s Negative (-) battery cable.
- Remove the fuse from the yellow fuse holder. Attach the ring terminal to the Positive (+) battery cable.
- Connect the other end of the fuse holder to the black 12-gauge wire using the yellow butt connector.
-
Reconnect the Battery and Test:
- Reconnect the vehicle’s Negative (-) battery cable.
- Install the 15-amp fuse into the fuse holder.
- Test the installation with a test light or trailer.
-
Secure the Wiring Harness:
- Use the provided cable ties to secure the T-Connector harness, avoiding areas that may pinch, cut, or melt the wire.
-
Reinstall the Taillights:
- Reinstall the taillights removed in Step 1.
-
Mount the 4-Flat Connector:
- Mount the 4-flat end in an accessible location using a bracket or electrical box (not included).
Safety Notes:
- Overloading circuits can cause fires. Do not exceed stated product ratings or vehicle manufacturer specifications.
- Always wear safety glasses and follow safety precautions during installation.
Manufacturer Notes:
- Refer to the vehicle owner’s manual and the instruction sheet for additional details.
- Store these instructions for future reference.
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