Trailer Wiring and Bracket For 16‑21 Mazda CX‑3 All Styles 4‑Flat Harness Plug Play
Model: 118718 118144Plug and Play T-One Wiring Harness Connector
4-Flat Mounting Bracket
Fits The Following Vehicles
2016 - 2021 Mazda, CX-3, All Styles
Direct Plug & Play Wiring Kit
Wiring Kit Specs:
| Part Number | 118718 |
| Brand | Tekonsha |
| Warranty | 1 Year |
| Installation Instructions |  |
| Part Number | 118144 |
| Fits | 4 Flat Connectors |
| Brand | Tow Ready |
| Mounts electrical connector to attachment bracket Includes screws and nuts Attractive point-of-purchase packaging |
|
| Warranty | 1 Year |
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 2016 2017 2018 2019 2020 2021
$70 16 $86.60 19% OFF
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$86.60 $70 16
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Product Details
- Brand: Tekonsha
- Model: 118718 118144
- Includes: T-One T-Connector Custom Harness, Mounting Bracket
Compatibility Chart
Description
Plug and Play T-One Wiring Harness Connector
4-Flat Mounting Bracket
Fits The Following Vehicles
2016 - 2021 Mazda, CX-3, All Styles
Direct Plug & Play Wiring Kit
Wiring Kit Specs:
| Part Number | 118718 |
| Brand | Tekonsha |
| Warranty | 1 Year |
| Installation Instructions | |
| Part Number | 118144 |
| Fits | 4 Flat Connectors |
| Brand | Tow Ready |
| Mounts electrical connector to attachment bracket Includes screws and nuts Attractive point-of-purchase packaging |
|
| Warranty | 1 Year |
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 2016 2017 2018 2019 2020 2021
Get Expert Help
Trailer Wiring and Bracket For 16-21 Mazda CX-3 All Styles 4-Flat Harness Plug Play Install Notes
Installation Instructions for T-One® T-Connector for Mazda CX-3
Part Numbers:
- 118718
Tools Required:
- Trim Panel Remover
- 10mm Socket & Ratchet or Wrench
- Drill (3/32” Drill Bit)
- Wire Crimpers
- Wire Cutters
- Phillips Head Screwdriver
- Test Probe
Step-by-Step Instructions:
-
Locate Vehicle Wiring:
- Inside the rear cargo area, partially remove the plastic threshold cover, side panels, and cargo trays to access the wiring.
-
Connect the Driver-Side T-Connector:
- Separate the vehicle’s wiring connectors on the driver’s side, ensuring not to damage the locking tabs.
- Insert the T-Connector end with the yellow and brown wire between the vehicle wiring connectors. Ensure connectors are clean and fully locked into place.
-
Route the Passenger-Side T-Connector:
- Route the T-Connector containing the green and red wire below the threshold cover to the passenger’s side taillight housing.
- Repeat Step 2 for the passenger side using the T-Connector with the green and red wire.
-
Ground the White Wire:
- Locate a suitable grounding point near the connector, such as an existing ground stud, or drill a 3/32” hole.
- Secure the white wire using the provided eyelet and screw. Clean the area of dirt and rustproofing before securing.
Caution: Verify what is behind any surface before drilling to prevent damage or injury. Avoid drilling into exposed surfaces.
-
Mount the Black Box Module:
- Locate a flat, out-of-the-way surface and mount the black box module to prevent damage or rattling.
-
Connect the Power Wire:
- Locate the black 12-gauge power wire from the T-Connector box and attach the provided black wire.
- Route the black wire along the exterior frame or existing wiring to the engine compartment, avoiding areas that may pinch or damage the wire.
Warning: Avoid routing the wire near hot pipes, heat shields, or fuel tanks.
-
Connect to the Vehicle Battery:
- Disconnect the vehicle’s Negative (-) battery cable.
- Remove the fuse from the yellow fuse holder (provided).
- Attach the ring terminal from the fuse holder to the Positive (+) battery cable.
- Connect the other end of the fuse holder to the black 12-gauge wire using the yellow butt connector.
Warning: Follow all warnings and precautions on the tow vehicle’s battery.
-
Reconnect the Battery and Test:
- Reconnect the vehicle’s Negative (-) battery cable.
- Insert the 15-amp fuse into the fuse holder and test the installation with a test light or trailer.
- Reset the vehicle’s electrical system by temporarily removing the key from the ignition.
-
Secure the Wiring Harness:
- Use the provided cable ties to secure the wiring harness, avoiding areas that may pinch, cut, or melt the wire.
-
Reassemble the Vehicle:
- Reinstall the plastic trim panels, threshold, storage covers, floor covering, and any other removed items.
- Ensure no wires are pinched or damaged.
-
Store the 4-Flat Connector:
- Store the 4-flat connector in the rear cargo area when not in use.
Specifications:
- Max. stop/turn light: 2 per side (4.2 amps)
- Max. tail lights: 7.5 amps
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.
Installation Instructions for T-One® T-Connector for Mazda CX-3
Part Numbers:
- 118718
Tools Required:
- Trim Panel Remover
- 10mm Socket & Ratchet or Wrench
- Drill (3/32” Drill Bit)
- Wire Crimpers
- Wire Cutters
- Phillips Head Screwdriver
- Test Probe
Step-by-Step Instructions:
-
Locate Vehicle Wiring:
- Inside the rear cargo area, partially remove the plastic threshold cover, side panels, and cargo trays to access the wiring.
-
Connect the Driver-Side T-Connector:
- Separate the vehicle’s wiring connectors on the driver’s side, ensuring not to damage the locking tabs.
- Insert the T-Connector end with the yellow and brown wire between the vehicle wiring connectors. Ensure connectors are clean and fully locked into place.
-
Route the Passenger-Side T-Connector:
- Route the T-Connector containing the green and red wire below the threshold cover to the passenger’s side taillight housing.
- Repeat Step 2 for the passenger side using the T-Connector with the green and red wire.
-
Ground the White Wire:
- Locate a suitable grounding point near the connector, such as an existing ground stud, or drill a 3/32” hole.
- Secure the white wire using the provided eyelet and screw. Clean the area of dirt and rustproofing before securing.
Caution: Verify what is behind any surface before drilling to prevent damage or injury. Avoid drilling into exposed surfaces.
-
Mount the Black Box Module:
- Locate a flat, out-of-the-way surface and mount the black box module to prevent damage or rattling.
-
Connect the Power Wire:
- Locate the black 12-gauge power wire from the T-Connector box and attach the provided black wire.
- Route the black wire along the exterior frame or existing wiring to the engine compartment, avoiding areas that may pinch or damage the wire.
Warning: Avoid routing the wire near hot pipes, heat shields, or fuel tanks.
-
Connect to the Vehicle Battery:
- Disconnect the vehicle’s Negative (-) battery cable.
- Remove the fuse from the yellow fuse holder (provided).
- Attach the ring terminal from the fuse holder to the Positive (+) battery cable.
- Connect the other end of the fuse holder to the black 12-gauge wire using the yellow butt connector.
Warning: Follow all warnings and precautions on the tow vehicle’s battery.
-
Reconnect the Battery and Test:
- Reconnect the vehicle’s Negative (-) battery cable.
- Insert the 15-amp fuse into the fuse holder and test the installation with a test light or trailer.
- Reset the vehicle’s electrical system by temporarily removing the key from the ignition.
-
Secure the Wiring Harness:
- Use the provided cable ties to secure the wiring harness, avoiding areas that may pinch, cut, or melt the wire.
-
Reassemble the Vehicle:
- Reinstall the plastic trim panels, threshold, storage covers, floor covering, and any other removed items.
- Ensure no wires are pinched or damaged.
-
Store the 4-Flat Connector:
- Store the 4-flat connector in the rear cargo area when not in use.
Specifications:
- Max. stop/turn light: 2 per side (4.2 amps)
- Max. tail lights: 7.5 amps
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.
Technical Support:
For technical support and assistance, our team of experts is available to help. You can reach our tech support by visiting www.trailerjacks.com or calling 877-869-6690.
Warranty Information:
For complete warranty instructions, please download the full installation PDF.
Note: Store the 4-flat connector in the rear cargo area when not in use to prevent damage.
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