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Tekonsha
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2018 - 2024 Chevrolet Equinox
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2018 - 2024 GMC Terrain
Confirmed to Fit
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Tekonsha T-One connector (also referred to as T-Connector) wiring harnesses are the fastest and easiest way to add an electrical connector to the back of your vehicle. These connectors are used to link the wiring from your vehicle to the trailer when towing. Tekonsha T-One connectors feature custom designs to fit each vehicle make and model based on manufacturer specifications. Plus, the Plug & Play connectors on the end of the wires make it easy to install. No cutting or splicing!
Tekonsha offers the largest, most complete line of T-One connectors. To install a Tekonsha T-One wiring harness, simply locate your vehicle's wiring harness connector typically behind the vehicle taillight - unplug the connection and insert the T-Connector into the vehicle's harness. It's that easy! So what are you waiting for? Hit the road with the peace of mind only Tekonsha can provide. Life's a Journey. Stop Often.
| BRAND: | TEKONSHA |
| PART NUMBER: | 118853 |
| WARRANTY: | LIMITED 1 YEAR WARRANTY |
| WEIGHT: | 1.5 LBS |
| UNIVERSAL OR SPECIFIC FIT: | SPECIFIC |
| CIRCUIT PROTECTED: | YES |
| HARNESS TYPE: | MALE FEMALE |
| TERMINAL QUANTITY: | 4 |
| WIRE COLORS: | BROWN, GREEN, WHITE, YELLOW |
| WIRE QUANTITY: | 4 |
| WIRE GAUGE: | 18 AWG, .85 AVSS |
| POWER LEAD REQUIRED: | NO |
| ELECTRICAL SYSTEM TYPE: | 2-WIRE SYSTEM |
| HARDWARE INCLUDED: | YES |
Tekonsha is a leading manufacturer of electronic trailer brake controllers, pioneering the category in the 1970s. The lineup spans proportional units such as the Prodigy P3 and Prodigy iD, time-delayed controllers, the wireless Prodigy RF, plus vehicle-specific wiring harnesses, adapters and trailer brake components engineered for smooth, predictable stopping at any speed.
Tekonsha Engineering Company began in 1964 building RV steps and mirrors. Within a few years it had found its real calling, and by the 1970s Tekonsha was pioneering the manufacture of electronic trailer brake controllers, the product category that still defines the brand. More than half a century later it remains the reference name in trailer braking and is part of the Horizon Global group alongside Reese, Draw-Tite, Fulton, Bulldog and Wesbar.
A brake controller is the component that tells a trailer's electric brakes how hard to work and when, and getting that right is the difference between a controlled stop and a shove from behind. Tekonsha builds both major types. Proportional controllers use an internal accelerometer to sense how quickly the tow vehicle is slowing and apply trailer braking to match, so light braking stays light and hard braking is immediate. Time-delayed controllers ramp to a preset output over a fixed interval, a simpler and more economical approach that suits occasional towing.
The current brake controller range covers most of that ground. The Prodigy iD pairs with a phone through Tekonsha's EDGE technology for setup and monitoring, the P3 offers storable settings for multiple trailers and a trilingual colour LED display, the Prodigy P2 adds a dimmable display and boost mode for heavier loads, and the Voyager keeps operation simple and dependable. The Prodigy RF mounts to the trailer itself and controls wirelessly, which suits rental fleets and drivers who swap tow vehicles.
Installation is supported by vehicle-specific brake control harnesses that plug into a factory connector rather than requiring cut-and-splice wiring, along with mounting brackets and adapters. Matched controller bundles pair a unit with the correct harness. Products are tested to meet and often exceed published industry standards.
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2 compatible vehicles
| Year | Make & Model | Notes |
|---|---|---|
| 2018 - 2024 | Chevrolet Equinox | Tow Harness T: Connector Assembly Uses all existing holes. No Drilling required Install Time is 45 minutes |
| 2018 - 2024 | GMC Terrain | Tow Harness T: Connector Assembly Uses all existing holes. No Drilling required Install Time is 45 minutes |
The 2018-2023 GMC Terrain, 2018-2023 Chevrolet Equinox Tekonsha Plug & Play T-Connector Adapter Trailer Wiring 118853 (Part #TK118853) fits the following vehicles: 2018-2024 Chevrolet Equinox; 2018-2024 GMC Terrain. Always verify your specific year, make, and model before ordering.
Yes, the 2018-2023 GMC Terrain, 2018-2023 Chevrolet Equinox Tekonsha Plug & Play T-Connector Adapter Trailer Wiring 118853 (Part #TK118853) is designed to fit the 2018-2024 Chevrolet Equinox.
The 2018-2023 GMC Terrain, 2018-2023 Chevrolet Equinox Tekonsha Plug & Play T-Connector Adapter Trailer Wiring 118853 (Part #TK118853) fits 2018-2024 Chevrolet Equinox models. The 2024 model year is the last year covered by this part number. For newer models, check for an updated version.
The 2018-2023 GMC Terrain, 2018-2023 Chevrolet Equinox Tekonsha Plug & Play T-Connector Adapter Trailer Wiring 118853 (Part #TK118853) Refer to the included instructions for installation details. Basic hand tools are typically all you need.
Part number 118853 is the T-One® Connector Harness, a trailer wiring connector system manufactured by Horizon Global. It provides a 6-pin connector interface at the rear of the vehicle and a 4-flat connector for trailer lighting connections. The system uses relays to manage trailer lighting circuits and must be fully connected to function properly.
Part number 118853 is designed for Chevrolet Equinox and GMC Terrain vehicles. However, the manual states that specific model years and trim levels must be verified on the Horizon Global website at www.horizonglobal.com, as compatibility varies by year and trim. Contact technical support at 800-632-3290 or TechnicalSupport@horizonglobal.com to confirm fitment for your specific vehicle.
The hardware kit includes: relays, a test light, cable ties, wire cutters, and a protective connector cap. The manual specifies that safety glasses are required for installation. A bracket or electrical box to mount the 4-flat connector end is not included and must be sourced separately. The manual does not specify the quantity of each item.
Yes. The manual explicitly requires you to locate the vehicle's battery, disconnect and isolate the negative battery cable before beginning installation. The manual also warns: DO NOT touch the negative battery terminal to the positive battery terminal, as serious injury and damage to the vehicle's electrical system can occur.
The matching black 6-pin T-One® Connector harness wiring connector is located at the rear of the vehicle behind the bumper cover on the driver's side. The 6-pin connector must be inserted and locked into place at this location. The 4-flat harness end should be routed underneath and to the center of the vehicle and mounted in an accessible location with a bracket or electrical box (not included).
Insert the relays into the mating connector housings on the T-One® Connector harness. This is the first step of installation, performed before connecting the harness to the vehicle. The manual does not specify the number of relays or provide detailed relay specifications.
Remove the protective cap from the connector before inserting the 6-pin T-One® Connector harness. Store the protective cap in the glove compartment along with the installation instructions for future reference.
Check that the mating surfaces of the connectors are free of dirt and clean if necessary. Insert the 6-pin T-One® Connector harness and lock into place. Ensure that the connectors are fully inserted with locking tabs in place. The manual emphasizes that all connections must be complete for the T-One® Connector to function properly.
Route the T-One® Connector rearward to the back of the bumper fascia. If routing the wire through a grommet and along the exterior of the vehicle, carefully avoid hot pipes, heat shields, the fuel tank, or any other points that may pinch or break the wire. Route the 4-flat harness underneath and to the center of the vehicle. Secure the remainder of the harness with the provided cable ties, being careful to avoid areas that would pinch, cut, or melt the wire.
Mount the 4-flat end in an accessible location with a bracket or electrical box. The bracket or electrical box is not included with the product and must be sourced separately. The location should allow easy access for trailer connection.
Always wear safety glasses during installation. Read and follow all warnings and instructions printed on the tow vehicle's battery. DO NOT touch the negative battery terminal to the positive battery terminal—serious injury and damage to the vehicle's electrical system can occur. Overloading circuits can cause fires. DO NOT exceed the stated product ratings or the towing manufacturing rating in your vehicle owner's manual.
Test and verify installation with a test light or trailer once installed. For the initial test, reset the vehicle electrical system by temporarily removing the key from the ignition. The test light is included in the hardware kit. All connections must be complete for the T-One® Connector to function properly before testing.
Perform a pre-trip inspection of the 4-way flat harness to ensure no damage to terminals and connection points for proper lighting connection and operation. Clean the 4-way flat connector after each use. Clean the connection and add dielectric grease (sold separately) to the terminal pins. Ensure the 4-way flat harness does not get pinched in door latches, trailer connection points, or allow contact with the road surface.
First, ensure the T-One® Connector ends are fully inserted and locked in place. Remove the module's power fuse for 10 seconds and repeat the test. Check chassis grounds and ensure ring terminals are in full contact with the vehicle chassis. If the issue persists, remove the module's power fuse again.
Installation may have activated circuit protection. Start the vehicle and turn all functions off: tail lights (headlights), brake, and turns. Remove the module power fuse for 10 seconds and repeat the test. Ensure the fuse is fully inserted into the fuse holder with no breaks. Verify the fuse holder is connected properly to the positive post of the battery. Using a tester or voltmeter, check for voltage on either side of the yellow butt connector near the module. Remove the module power fuse for 10 seconds and repeat the test.
Part 118853 is designed for Chevrolet Equinox and GMC Terrain. Verify specific model years and trim levels on www.horizonglobal.com or call 800-632-3290.
The kit includes relays, test light, cable ties, wire cutters, and a protective connector cap. A bracket or electrical box for mounting the 4-flat end is not included and must be purchased separately.
Yes. You must disconnect and isolate the vehicle's negative battery cable before installation begins.
The manual does not mention drilling, cutting, trimming, grinding, welding, or bending. Installation involves connecting the harness to the existing 6-pin connector location behind the bumper cover on the driver's side.
Always wear safety glasses. Disconnect the negative battery cable first. DO NOT touch negative to positive battery terminals. DO NOT exceed the product's amperage rating or your vehicle's towing rating. Overloading circuits can cause fires.
Use the included test light or connect a trailer to verify operation. Reset the vehicle electrical system by temporarily removing the ignition key. All connections must be complete before testing.
Inspect the 4-way flat harness before each trip for damage. Clean the connector after each use and apply dielectric grease (sold separately) to terminal pins. Ensure the harness is not pinched in door latches or trailer connection points.
Cause 1: Connectors not fully inserted or locked. Solution: Ensure T-One® Connector ends are fully inserted and locked in place. Remove the module's power fuse for 10 seconds and repeat the test. Cause 2: Poor chassis ground connection. Solution: Check chassis grounds and ensure ring terminals are in full contact with the vehicle chassis. Remove the module's power fuse. Cause 3: Circuit protection activated during installation. Solution: Start the vehicle and turn all functions off (tail lights, brake, turns). Remove the module power fuse for 10 seconds and repeat the test.
Cause 1: Circuit protection activated. Solution: Start the vehicle and turn all functions off (tail lights, brake, turns). Remove the module power fuse for 10 seconds and repeat the test. Cause 2: Fuse not fully inserted or broken. Solution: Ensure the fuse is fully inserted into the fuse holder with no breaks. Remove the fuse for 10 seconds and repeat the test. Cause 3: Fuse holder not properly connected to battery. Solution: Verify the fuse holder is connected properly to the positive post of the battery. Cause 4: Module not receiving power. Solution: Using a tester or voltmeter, check for voltage on either side of the yellow butt connector near the module. Remove the module power fuse for 10 seconds and repeat the test.
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May 22, 2023
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