Product Details
- Brand: Tekonsha
- Model: 118819 118144
- Includes: T-One T-Connector Custom Harness, Mounting Bracket
Compatibility Chart
Description
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Trailer Wiring and Bracket For 20-23 Hyundai Sonata Plug & Play 4-Flat Harness Install Notes
Installation Instructions for T-One® T-Connector for Hyundai Sonata
Part Numbers:
- 118819
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:
-
Open the Trunk:
- Temporarily remove the rear threshold plate.
- Partially remove the felt trunk liner behind the taillights to access the vehicle’s taillight wiring harness.
-
Locate the Vehicle’s Wiring Harness:
- On both the driver and passenger sides, locate the taillight wiring harness.
- Disconnect the harness connectors carefully, ensuring not to break the locking tabs.
- Clean all connector surfaces of dirt and debris.
-
Connect the Driver-Side T-Connector:
- Insert the T-One® Connector end with the yellow wire between the driver-side wiring connectors.
- Ensure all connections are secure and the locking tabs are engaged.
-
Route the Passenger-Side T-Connector:
- Route the green wire behind the panels and along the threshold to the passenger side.
- Connect the T-One® Connector end with the green wire between the passenger-side wiring connectors.
-
Ground the White Wire:
- Locate a suitable grounding point near the connector, such as the vehicle’s frame or crossmember.
- Clean the grounding area of dirt and rustproofing.
- Drill a 3/32” hole and secure the white wire using the provided eyelet and screw.
Caution: Verify the area behind any surface before drilling to avoid damage or injury.
-
Route the Power Wire:
- Locate the black 12-gauge power wire from the T-One® T-Connector box on the driver’s side.
- Attach the provided black wire and route it along the vehicle’s exterior frame to the engine compartment, avoiding areas that may pinch, cut, or damage the wire.
-
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 to the Positive (+) battery cable and secure it.
- Connect the other end of the fuse holder to the black wire using the provided yellow butt connector.
Warning: Follow all warnings printed on the tow vehicle’s battery.
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Reconnect the Battery and Test:
- Reconnect the Negative (-) battery cable.
- 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.
-
Mount the T-One® Black Box:
- Locate a flat surface in an out-of-the-way location and mount the black box module using the provided double-sided tape.
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Secure the Harness:
- Use the provided cable ties to secure the remaining T-One® T-Connector harness, avoiding areas where it could pinch, cut, or melt.
-
Reassemble the Vehicle:
- Replace all panels, clips, and floor coverings removed during installation, ensuring no wires are pinched or damaged.
-
Store the 4-Flat Connector:
- Store the 4-flat connector in the trunk area when not in use.
Safety Notes:
- Overloading circuits can cause fires. Do not exceed stated product ratings.
- Always wear safety glasses and follow all 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.