Trailer Wiring Harness Kit For 18‑21 Chevy Equinox except Premier

Model: 118750

This Wiring Fits The Following Vehicles:

2018 - 2021 Chevrolet, Equinox, Except Premier without factory tow package

Direct Plug & Play Wiring Kit

Part Number	118750
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:
18 19 20 21 2018 2019 2020 2021

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Product Details

Brand: Tekonsha
Model: 118750
UPC: 016118030747
Includes: T-One T-Connector Custom Harness

Compatibility Chart

Description

This Wiring Fits The Following Vehicles:

2018 - 2021 Chevrolet, Equinox, Except Premier without factory tow package

Direct Plug & Play Wiring Kit

Part Number	118750
Brand	Tekonsha
Warranty	1 Year
Installation Instructions

Questions or Comments? Call 702-374-8999

Specifications

Specification
Circuit Protected	Yes
Hardware Included	Yes
Harness Type	4-Way Flat (Vehicle Side)
Terminal Quantity	4
Universal Or Specific Fit	Specific Fit
Wire Colors	Brown, Green, Yellow, White
Wire Quantity	4 Wires

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Tags: 118750 , 2018 , 2019 , 2020 , 2021 , 18 , 19 , 20 , 21 , Chevrolet , Equinox , Except , Premier , Tekonsha , Trailer , Wiring , Harness

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Trailer Wiring Harness Kit For 18-21 Chevy Equinox except Premier Install Notes

Installation Instructions for T-One® T-Connector for Chevrolet Equinox

Part Numbers:

118750

Tools Required:

Trim Panel Remover
10mm Socket & Ratchet or Wrench
Drill (3/32” Drill Bit)
Wire Crimpers
Wire Cutters
Phillips Head Screwdriver
Test Probe
Torx T10 Driver

Step-by-Step Instructions:

Remove the Taillight Assemblies:
- Open the rear tailgate to access the bolts holding the taillights in place.
- On both the driver and passenger sides, remove the two T10 Torx screws securing each taillight.
- Carefully pull the taillight housings away from the vehicle, ensuring not to damage the alignment pins. Set the housings aside.
Locate the Taillight Wiring Harness:
- On both sides of the vehicle, locate the taillight wiring harness with connection points matching the T-One® Connector ends.
- Separate the connectors carefully, ensuring not to break the locking tabs. Ensure all connector surfaces are clean and free of dirt.
Mount the T-Connector Black Box:
- Underneath the vehicle, determine a suitable mounting point behind the rear bumper fascia on the driver’s side.
- Mount the T-Connector black box using the provided double-sided tape.
- Ensure the trailer wiring harness has adequate length to reach this point.
Warning: Mount the module with the epoxy side pointed downward to prevent water buildup.
Route the Driver-Side T-Connector:
- Fish the T-Connector end with the yellow wires up between the bumper and vehicle body into the driver’s side taillight pocket.
- Insert the T-Connector end with the yellow wire between the taillight socket and vehicle wiring harness.
Route and Connect the Passenger-Side T-Connector:
- Route the T-Connector end with the green wire underneath the bumper to the passenger side.
- Fish the green wire up through the opening on the passenger side to the taillight pocket.
- Repeat Step 4 on the passenger side.
Ground the White Wire:
- Locate a suitable grounding point near the connector, such as the vehicle’s frame or crossmember.
- Clean dirt and rustproofing from the area.
- 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.
Route the Power Wire:
- Locate the black 12-gauge power wire from the T-Connector box on the driver’s side.
- Attach the provided black wire and route it along the exterior frame or follow existing wiring to the engine compartment.
- Avoid areas that may pinch, cut, or damage the wire.
Warning: Avoid routing near hot pipes, heat shields, or the fuel tank.
Connect to the Vehicle Battery:
- Disconnect the 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 provided yellow butt connector.
Reconnect the Battery and Test:
- Reconnect the Negative (-) battery cable.
- Insert the 15-amp fuse into the fuse holder.
- 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 T-Connector harness, avoiding areas that may pinch, cut, or melt the wire.
Mount the 4-Flat Connector:
- Route the 4-flat connector underneath the vehicle to the center.
- 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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