Trailer Wiring and Bracket For 12‑18 Chevy Sonic Plug & Play 4‑Flat Harness
Model: 118640 118144Plug and Play T-One Wiring Harness Connector
4-Flat Mounting Bracket
Installation Instructions
Fits The Following Vehicles
2012 - 2018 Chevrolet, Sonic, 4 Dr. Sedan
2012 - 2018 Chevrolet, Sonic, 5 Dr. Hatchback
Direct Plug & Play Wiring Kit
Wiring Specs
| Part Number | 118640 |
| 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:
12 13 14 15 16 17 18 2012 2013 2014 2015 2016 2017 2018
$87 08 $117.77 26% OFF
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Product Details
- Brand: Tekonsha
- Model: 118640 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
Installation Instructions
Fits The Following Vehicles
2012 - 2018 Chevrolet, Sonic, 4 Dr. Sedan
2012 - 2018 Chevrolet, Sonic, 5 Dr. Hatchback
Direct Plug & Play Wiring Kit
Wiring Specs
| Part Number | 118640 |
| 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:
12 13 14 15 16 17 18 2012 2013 2014 2015 2016 2017 2018
Get Expert Help
Trailer Wiring and Bracket For 12-18 Chevy Sonic Plug & Play 4-Flat Harness Install Notes
Installation Instructions for T-Connector Adapter for Sonice Sedan and Sonic Hatch
Part Numbers:
- 118640
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:
-
Sedan Models:
- Open the trunk and remove the threshold panel.
- Partially remove the corner felt trunk liner on both sides to expose the vehicle’s taillight wiring harness.
-
Hatchback Models:
- Open the rear hatch and remove the plastic threshold cover, side panels, and cargo trays to access the vehicle’s taillight wiring harness.
-
Access the Vehicle’s Taillight Wiring Harness:
- Locate the connection points matching the ends of the T-Connector adapter behind each vehicle taillight housing.
- On the driver’s side, disconnect the vehicle’s wiring connectors, being careful not to break the locking tabs.
- Insert the T-Connector end with the yellow wire between the vehicle wiring connectors and lock into place.
-
Route the Passenger-Side T-Connector:
- Route the T-Connector end with the green wire to the passenger side behind the panels and along the threshold.
- Repeat Step 3 for the passenger side, connecting the green wire.
-
Ground the White Wire:
- Locate a suitable grounding point near the connectors on the driver’s side.
- Drill a 3/32” hole and secure the white wire using the provided eyelet and screw.
Caution:
- Verify what is behind any surface before drilling to avoid damage or injury. Do not drill into exposed surfaces.
-
Connect the Grey 12-Pin Connector:
- Locate the T-Connector’s grey 12-pin connector and insert it into the mating connector on the black box module.
- Ensure all connector surfaces are clean and fully inserted with locking tabs secure.
-
Mount the Black Box Module:
- Find a flat, moisture-free surface inside the vehicle to mount the black box using the provided double-sided tape.
- Ensure the box is positioned to prevent exposure to direct water or liquid contact.
Warning:
- The black box module must be mounted inside the vehicle. Mounting it on exterior surfaces or areas exposed to elements may cause serious damage.
-
Connect the Black Power Wire:
- Inside the vehicle, connect the black 12-gauge wire from the T-Connector black box to the provided black wire using the yellow butt connector.
- Route the black wire through a grommet and along the vehicle frame or follow existing wiring to the engine compartment up to the battery.
Warning:
- Avoid routing near hot pipes, heat shields, or areas that may pinch or break the wire.
-
Connect to the Vehicle Battery:
- Disconnect the vehicle’s negative (-) battery cable.
- Attach the yellow fuse holder to the vehicle’s positive (+) battery cable using the provided ring terminal.
- Connect the black wire to the fuse holder using the yellow butt connector.
- Insert the 15-amp fuse into the fuse holder.
-
Test the Installation:
- Reconnect the vehicle’s negative (-) battery cable.
- Test the T-Connector installation with a test light or trailer.
-
Secure the Wiring:
- Use the provided cable ties to secure the T-Connector harness, avoiding areas that may pinch, cut, or melt the wire.
-
Reassemble the Vehicle:
- Replace all panels, carpet, and any clips removed during installation, ensuring no wires are pinched or cut.
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 the towing manufacturer’s rating or the specified maximum circuit ratings.
- Always wear safety glasses and follow safety precautions.
Manufacturer Notes:
- Store the 4-flat connector in the trunk area when not in use.
- Refer to the vehicle owner’s manual for additional information.
Installation Instructions for T-Connector Adapter for Sonic Sedan and Sonic Hatch
Part Numbers:
- 118640
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:
-
Sedan Models:
- Open the trunk and remove the threshold panel.
- Partially remove the corner felt trunk liner on both sides to expose the vehicle’s taillight wiring harness.
-
Hatchback Models:
- Open the rear hatch and remove the plastic threshold cover, side panels, and cargo trays to access the vehicle’s taillight wiring harness.
-
Access the Vehicle’s Taillight Wiring Harness:
- Locate the connection points matching the ends of the T-Connector adapter behind each vehicle taillight housing.
- On the driver’s side, disconnect the vehicle’s wiring connectors, being careful not to break the locking tabs.
- Insert the T-Connector end with the yellow wire between the vehicle wiring connectors and lock into place.
-
Route the Passenger-Side T-Connector:
- Route the T-Connector end with the green wire to the passenger side behind the panels and along the threshold.
- Repeat Step 3 for the passenger side, connecting the green wire.
-
Ground the White Wire:
- Locate a suitable grounding point near the connectors on the driver’s side.
- Drill a 3/32” hole and secure the white wire using the provided eyelet and screw.
Caution:
- Verify what is behind any surface before drilling to avoid damage or injury. Do not drill into exposed surfaces.
-
Connect the Grey 12-Pin Connector:
- Locate the T-Connector’s grey 12-pin connector and insert it into the mating connector on the black box module.
- Ensure all connector surfaces are clean and fully inserted with locking tabs secure.
-
Mount the Black Box Module:
- Find a flat, moisture-free surface inside the vehicle to mount the black box using the provided double-sided tape.
- Ensure the box is positioned to prevent exposure to direct water or liquid contact.
Warning:
- The black box module must be mounted inside the vehicle. Mounting it on exterior surfaces or areas exposed to elements may cause serious damage.
-
Connect the Black Power Wire:
- Inside the vehicle, connect the black 12-gauge wire from the T-Connector black box to the provided black wire using the yellow butt connector.
- Route the black wire through a grommet and along the vehicle frame or follow existing wiring to the engine compartment up to the battery.
Warning:
- Avoid routing near hot pipes, heat shields, or areas that may pinch or break the wire.
-
Connect to the Vehicle Battery:
- Disconnect the vehicle’s negative (-) battery cable.
- Attach the yellow fuse holder to the vehicle’s positive (+) battery cable using the provided ring terminal.
- Connect the black wire to the fuse holder using the yellow butt connector.
- Insert the 15-amp fuse into the fuse holder.
-
Test the Installation:
- Reconnect the vehicle’s negative (-) battery cable.
- Test the T-Connector installation with a test light or trailer.
-
Secure the Wiring:
- Use the provided cable ties to secure the T-Connector harness, avoiding areas that may pinch, cut, or melt the wire.
-
Reassemble the Vehicle:
- Replace all panels, carpet, and any clips removed during installation, ensuring no wires are pinched or cut.
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 the towing manufacturer’s rating or the specified maximum circuit ratings.
- Always wear safety glasses and follow safety precautions.
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.
Manufacturer Notes:
- Store the 4-flat connector in the trunk area when not in use.
- Refer to the vehicle owner’s manual for additional information.
Warranty Information:
For complete warranty instructions, please download the full installation PDF.
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