Installation Instructions for T-One® T-Connector for Jeep Cherokee

Part Numbers:

• 118779

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
• Torx 30 Driver

Step-by-Step Instructions:

1. Remove the Taillight Assemblies:

• Open the rear tailgate to access the bolts securing the taillights.
• On both the driver and passenger sides, remove the two Torx-30 screws holding the taillights.
• Carefully pull the taillights away from the vehicle, being cautious not to damage the alignment pins.

2. Disconnect the Wiring Harness:

• Locate the vehicle’s taillight wiring harness on both the driver and passenger sides.
• Disconnect the harness connectors carefully, ensuring not to break the locking tabs.
• Ensure all connector surfaces are clean and free of dirt.

3. Mount the T-One® Black Box:

• Underneath the vehicle, determine a suitable mounting point behind the rear bumper fascia on the driver’s side.
• Secure the black box using the provided double-sided tape.
• Ensure the epoxy side faces downward to prevent water accumulation.

Warning:

• Ensure the black box is in a protected area to avoid damage from road debris.

4. Connect the Driver-Side T-Connector:

• Route the T-One® Connector end with the yellow wires up between the bumper and the vehicle body into the driver’s side taillight pocket.
• Insert the yellow wire connector between the taillight socket and the vehicle wiring harness.

5. Route and Connect the Passenger-Side T-Connector:

• Route the green wire connector underneath the bumper to the passenger side.
• Insert the green wire connector between the passenger-side taillight socket and the vehicle wiring harness.
• Avoid hot pipes, heat shields, and other points that may pinch or damage the wire.

6. Ground the White Wire:

• Locate a suitable grounding point near the connector, such as the vehicle’s frame or crossmember.
• Clean the area of dirt and rustproofing.
• 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 prevent damage or injury.

7. Route the Power Wire:

• On the driver’s side, locate the black 12-gauge power wire from the T-One® Connector box.
• Attach the provided black wire and route it along the exterior frame or existing wiring to the engine compartment.
• Avoid hot pipes, heat shields, or areas that may pinch or damage the wire.

8. Connect to the Vehicle Battery:

• Disconnect the Negative (-) battery cable.
• Remove the fuse from the yellow fuse holder and 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.

Warning:

• Follow all warnings printed on the tow vehicle’s battery.

9. 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.

10. Secure the Wiring Harness:

- Use the provided cable ties to secure the T-One® Connector harness.  
- Avoid areas that may pinch, cut, or melt the wire.

11. Route the 4-Flat Connector:

- Route the 4-flat harness underneath and to the center of the vehicle.  
- Mount the 4-flat connector in an accessible location using a bracket or electrical box (not included).

12. Reassemble the Vehicle:

- Reinstall the taillight assemblies and any other panels removed during installation.

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.

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.

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.

Warranty Information:

• For complete warranty instructions, please download the full installation PDF.