Trailer Hitch Wiring Harness Kit For 14‑21 Mazda 6 Sedan Plug & Play
Model: 118587Wiring Harness (Plug & Play)
Installation Instructions
Fits The Following Vehicles:
2014 - 2021 Mazda, 6, 4 Dr. Sedan
Wiring Kit Specs:
| Part Number | 118587 |
| 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:
14 15 16 17 18 19 20 21 2014 2015 2016 2017 2018 2019 2020 2021
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$99.60 $69 99
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Product Details
- Brand: Tekonsha
- Model: 118587
- UPC: 016118122893
- Includes: T-One T-Connector Custom Harness
Compatibility Chart
| Year Range | Make | Model | Style |
|---|
Description
Wiring Harness (Plug & Play)
Installation Instructions
Fits The Following Vehicles:
2014 - 2021 Mazda, 6, 4 Dr. Sedan
Wiring Kit Specs:
| Part Number | 118587 |
| 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:
14 15 16 17 18 19 20 21 2014 2015 2016 2017 2018 2019 2020 2021
Get Expert Help
Trailer Hitch Wiring Harness Kit For 14-21 Mazda 6 Sedan Plug & Play Install Notes
Installation Instructions for T-Connector Adapter for Mazda 6
Part Numbers:
- 118587
Tools Required:
- Trim Panel Remover
- 10mm Socket & Ratchet or 10mm Wrench
- Drill (3/32” Drill Bit)
- 1/4” Socket
- Wire Crimpers
- Wire Cutters
- Phillips Head Screwdriver
- Test Probe
Step-by-Step Instructions:
-
Open the Trunk:
- Remove the threshold panel.
- Partially remove the corner felt trunk liner on both sides to expose the vehicle’s taillight wiring harness.
-
Locate the Taillight Wiring Harness:
- Behind the taillights, locate the connection points matching the T-Connector ends.
- On the driver’s side, attach the T-Connectors containing the yellow and red wires to the vehicle’s taillight harness.
- Ensure all connectors are fully inserted with locking tabs in place.
-
Route the Passenger-Side T-Connector:
- Route the T-Connector containing the green wire below the threshold cover to the passenger’s side taillight housing.
- Connect the green wire T-Connector to the passenger-side taillight connectors.
-
Ground the White Wire:
- Locate a suitable grounding point near the driver-side connector.
- Clean the area of dirt and rustproofing.
- Drill a 3/32” hole and secure the white wire with the provided eyelet and screw.
Caution:
- Verify what is behind the surface before drilling to avoid damage or injury.
-
Connect the Power Wire:
- Inside the vehicle, connect the black 12-gauge wire and the red wire from the T-Connector black box using the supplied yellow butt connector.
- Route the black wire through a grommet or follow the existing wiring along the thresholds to the engine compartment and battery.
Warning:
- Avoid hot pipes, heat shields, or fuel tanks to prevent wire damage.
-
Connect to the Vehicle Battery:
- Disconnect the vehicle’s negative (-) battery cable.
- Remove the fuse from the yellow fuse holder.
- Attach the fuse holder to the positive (+) battery cable using the provided ring terminal and connect the black wire to the fuse holder with a yellow butt connector.
- Insert the 10-amp fuse into the fuse holder.
-
Reconnect the Battery:
- Reconnect the vehicle’s negative (-) battery cable.
- Test the system with a test light or trailer to verify installation.
-
Mount the Black Box:
- Locate a flat, out-of-the-way surface to mount the T-Connector’s black box using the provided double-sided tape.
-
Secure the Wiring:
- Use the provided cable ties to secure the remainder of the T-Connector harness.
- Avoid areas that could pinch, cut, or melt the wires.
-
Reassemble the Vehicle:
- Replace the carpet, trim panels, and any other items removed during installation.
- Ensure no wires are pinched or damaged.
-
Store the 4-Flat Connector:
- Store the 4-flat connector in the trunk area when not in use.
Specifications:
- Max. stop/turn light: 1 per side (2.1 amps)
- Max. tail lights: 5.6 amps
Safety Notes:
- Overloading circuits can cause fires. Do not exceed the product’s stated ratings or the vehicle manufacturer's specifications.
- Always wear safety glasses and follow safety precautions during installation.
Manufacturer Notes:
- Refer to the vehicle owner’s manual and instruction sheet for additional details.
- Store these instructions for future reference.
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