Trailer Wiring and Bracket w/ Light Tester For 19‑22 Volkswagen Jetta Plug & Play 4‑Flat Harness
Model: 118791 118144 20114Includes Everything Pictured:
Plug and Play T-One Wiring Harness Connector
4-Flat Mounting Bracket
4-Flat Car End Tester w/ LED Display
Fits The Following Vehicles:
2019 - 2022 Volkswagen, Jetta, All Styles
Wiring Kit Specs:
| Part Number | 118791 |
| Brand | Tekonsha |
| Warranty | 1 Year |
| Installation Instructions |  |
4-Flat Mounting Bracket
| 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 |
4-Flat Car End Tester
| Part Number | 20114 |
| Fits | 4 Flat Connectors |
| Brand | Tow Ready |
| 4-Flat Car End Tester w/LED Display Plug these testers into any car connector and you will have an instant test of running light circuits. |
|
| 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: 19 20 21 22 2019 2020 2021 2022
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$148.15 $114 44
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Product Details
- Brand: Tekonsha
- Model: 118791 118144 20114
- Includes: T-One T-Connector Custom Harness, Mounting Bracket, 4-Flat Car End Tester
Compatibility Chart
Description
Includes Everything Pictured:
Plug and Play T-One Wiring Harness Connector
4-Flat Mounting Bracket
4-Flat Car End Tester w/ LED Display
Fits The Following Vehicles:
2019 - 2022 Volkswagen, Jetta, All Styles
Wiring Kit Specs:
| Part Number | 118791 |
| Brand | Tekonsha |
| Warranty | 1 Year |
| Installation Instructions | |
4-Flat Mounting Bracket
| 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 |
4-Flat Car End Tester
| Part Number | 20114 |
| Fits | 4 Flat Connectors |
| Brand | Tow Ready |
| 4-Flat Car End Tester w/LED Display Plug these testers into any car connector and you will have an instant test of running light circuits. |
|
| 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: 19 20 21 22 2019 2020 2021 2022
Get Expert Help
Trailer Wiring and Bracket w/ Light Tester For 19-22 Volkswagen Jetta Plug & Play 4-Flat Harness Install Notes
Installation Instructions for T-One® T-Connector for Volkswagen Jetta
Part Numbers:
- 118791
Tools Required:
- Trim Panel Remover
- 10mm Socket & Ratchet or 10mm Wrench
- Torx 20 Driver
- Drill (3/32” Drill Bit)
- Wire Crimpers
- Wire Cutters
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.
-
Remove the Taillight Assemblies:
- Locate the bolts holding the taillights in place.
- Using a Torx 20 driver, remove the two bolts on each side.
- Carefully pull the taillights away from the vehicle, ensuring not to damage the alignment pins.
-
Access the Wiring Harness:
- Locate the vehicle’s taillight wiring harness on both sides of the vehicle.
- Disconnect the wiring harness from the taillight sockets.
-
Route the T-Connector Wiring:
- Locate the grommet between the taillight pocket and trunk.
- On both sides, unseat the grommet and slit it to allow for the T-Connector wiring.
- Route the T-Connector ends through the grommet hole and into the taillight pocket, reseating the grommet around the wires.
- Leave the 4-flat connector and black converter box in the cargo area.
-
Connect the Driver-Side T-Connector:
- Insert the T-One® Connector end with the yellow wire between the vehicle’s wiring connectors.
- Ensure connectors are fully inserted with locking tabs securely in place.
-
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.
- Caution: Verify what is behind the surface before drilling to avoid damage or injury.
-
Connect the Passenger-Side T-Connector:
- Route the green wire connector down the threshold to the passenger side.
- Insert the T-One® Connector end with the green wire between the passenger-side wiring connectors and lock it into place.
-
Route the Power Wire:
- Locate the black 12-gauge power wire from the T-One® Converter box.
- Attach the provided black wire and route it along the vehicle’s frame to the engine compartment, avoiding hot pipes, heat shields, or areas that may pinch or damage the wire.
-
Connect to the Vehicle 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 wire using the provided yellow butt connector.
-
Reconnect the Battery and Test:
- Reconnect the Negative (-) battery cable and insert the 15-amp fuse into the fuse holder.
- Test the installation using 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 T-One® Connector harness, avoiding areas that could pinch, cut, or melt the wire.
-
Reassemble the Vehicle:
- Reinstall the plastic trim panels, threshold, and other components removed during installation.
- 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.
Safety Notes:
- Overloading circuits can cause fires. Do not exceed stated product ratings.
- 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 Various Vehicles
Part Numbers:
- 118791
Tools Required:
- Trim Panel Remover
- 10mm Socket & Ratchet or 10mm Wrench
- Torx 20 Driver
- Drill (3/32” Drill Bit)
- Wire Crimpers
- Wire Cutters
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.
-
Remove the Taillight Assemblies:
- Locate the bolts holding the taillights in place.
- Using a Torx 20 driver, remove the two bolts on each side.
- Carefully pull the taillights away from the vehicle, ensuring not to damage the alignment pins.
-
Access the Wiring Harness:
- Locate the vehicle’s taillight wiring harness on both sides of the vehicle.
- Disconnect the wiring harness from the taillight sockets.
-
Route the T-Connector Wiring:
- Locate the grommet between the taillight pocket and trunk.
- On both sides, unseat the grommet and slit it to allow for the T-Connector wiring.
- Route the T-Connector ends through the grommet hole and into the taillight pocket, reseating the grommet around the wires.
- Leave the 4-flat connector and black converter box in the cargo area.
-
Connect the Driver-Side T-Connector:
- Insert the T-One® Connector end with the yellow wire between the vehicle’s wiring connectors.
- Ensure connectors are fully inserted with locking tabs securely in place.
-
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.
- Caution: Verify what is behind the surface before drilling to avoid damage or injury.
-
Connect the Passenger-Side T-Connector:
- Route the green wire connector down the threshold to the passenger side.
- Insert the T-One® Connector end with the green wire between the passenger-side wiring connectors and lock it into place.
-
Route the Power Wire:
- Locate the black 12-gauge power wire from the T-One® Converter box.
- Attach the provided black wire and route it along the vehicle’s frame to the engine compartment, avoiding hot pipes, heat shields, or areas that may pinch or damage the wire.
-
Connect to the Vehicle 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 wire using the provided yellow butt connector.
-
Reconnect the Battery and Test:
- Reconnect the Negative (-) battery cable and insert the 15-amp fuse into the fuse holder.
- Test the installation using 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 T-One® Connector harness, avoiding areas that could pinch, cut, or melt the wire.
-
Reassemble the Vehicle:
- Reinstall the plastic trim panels, threshold, and other components removed during installation.
- 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.
Safety Notes:
- Overloading circuits can cause fires. Do not exceed stated product ratings.
- Always wear safety glasses and follow safety precautions during installation.
Attention: This is a summary of the installation procedure. For complete installation instructions, including diagrams and detailed information from the manufacturer, please download the full installation PDF.
Manufacturer Notes:
- Refer to the vehicle owner’s manual and the instruction sheet for additional details.
- Store these instructions for future reference.
Warranty Information:
- For complete warranty instructions, please download the full installation PDF.
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.
