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

Part Numbers:

• 118847

Tools Required:

• Trim Panel Remover
• 10mm Socket & Ratchet or Wrench
• Torx T-25
• Drill (3/32” Drill Bit)
• Wire Crimpers
• Wire Cutters
• Phillips Head Screwdriver
• Test Probe

Step-by-Step Instructions:

1. Open the Hatch:

   • Locate the trim panels covering the taillights.
   • Use a T-25 Torx bit to remove the mounting screws on both the driver’s and passenger’s sides.
   • Be careful not to break the trim panel mounting tabs. Remove the taillight mounting screws and set the taillights aside.

2. Disconnect the Wiring Harness:

   • Disconnect the vehicle wiring harness from both taillight sockets.
   • Carefully separate the connectors, ensuring not to damage the locking tabs. Ensure all connector surfaces are clean and free of dirt.

3. Route the Passenger-Side T-Connector:

   • Begin on the passenger side and route the harness containing the green wire underneath the vehicle.
   • Route it up through the opening between the vehicle bumper and body into the passenger-side taillight pocket.

4. Connect the Passenger-Side T-Connector:

   • Insert the T-One® Connector end with the green wire between the vehicle wiring connectors and lock it in place.
   • Ensure connectors are fully inserted with locking tabs engaged.

   Caution: Ensure the module is mounted with the epoxy side pointing downward to prevent water buildup.

5. Mount the Black Box:

   • Determine a suitable mounting point behind the rear bumper fascia on the driver’s side.
   • Mount the T-One® Connector black box using the provided double-sided tape.

   Caution: Verify the area behind any surface before drilling to avoid damage to the vehicle or personal injury. Do not drill into exposed surfaces.

6. 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. Clean the grounding area of dirt and rustproofing.

   Warning: Avoid routing wires near hot pipes, heat shields, fuel tanks, or areas that may pinch or damage the wire.

7. Route the Driver-Side T-Connector:

   • Route the harness containing the yellow wire underneath the vehicle and up through the opening between the vehicle bumper and body into the driver-side taillight pocket.

8. Connect the Driver-Side T-Connector:

   • Insert the T-One® Connector end with the yellow wire between the vehicle wiring connectors and lock it in place.

9. Connect the Power Wire:

   • 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 12-gauge wire using the provided yellow butt connector.

10. Route the Power Wire:

    • Starting from the front of the vehicle, route the black 12-gauge wire rearward along the frame rail, avoiding areas that may pinch, cut, or damage the wire.

11. Connect the Power Wire to the Black Box:

    • Attach the black 12-gauge wire to the black power wire on the T-One® Connector black box using the provided yellow butt connector.

12. 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.

13. Reassemble the Vehicle:

    • Reinstall all plastic trim panels, thresholds, and other components removed during installation.
    • Ensure no wires are pinched or damaged.

14. Secure the Harness:

    • Mount the trailer tow harness in an accessible location with a bracket or electrical box.
    • Secure all loose wires with cable ties to avoid damage.

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.
• Always read and follow all warnings and instructions printed on the tow vehicle’s battery.

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

Part Numbers:

• 118847

Tools Required:

• Trim Panel Remover
• 10mm Socket & Ratchet or Wrench
• Torx T-25
• Drill (3/32” Drill Bit)
• Wire Crimpers
• Wire Cutters
• Phillips Head Screwdriver
• Test Probe

Step-by-Step Instructions:

1. Open the Hatch:

   • Locate the trim panels covering the taillights.
   • Use a T-25 Torx bit to remove the mounting screws on both the driver’s and passenger’s sides.
   • Be careful not to break the trim panel mounting tabs. Remove the taillight mounting screws and set the taillights aside.

2. Disconnect the Wiring Harness:

   • Disconnect the vehicle wiring harness from both taillight sockets.
   • Carefully separate the connectors, ensuring not to damage the locking tabs. Ensure all connector surfaces are clean and free of dirt.

3. Route the Passenger-Side T-Connector:

   • Begin on the passenger side and route the harness containing the green wire underneath the vehicle.
   • Route it up through the opening between the vehicle bumper and body into the passenger-side taillight pocket.

4. Connect the Passenger-Side T-Connector:

   • Insert the T-One® Connector end with the green wire between the vehicle wiring connectors and lock it in place.
   • Ensure connectors are fully inserted with locking tabs engaged.

   Caution: Ensure the module is mounted with the epoxy side pointing downward to prevent water buildup.

5. Mount the Black Box:

   • Determine a suitable mounting point behind the rear bumper fascia on the driver’s side.
   • Mount the T-One® Connector black box using the provided double-sided tape.

   Caution: Verify the area behind any surface before drilling to avoid damage to the vehicle or personal injury. Do not drill into exposed surfaces.

6. 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. Clean the grounding area of dirt and rustproofing.

   Warning: Avoid routing wires near hot pipes, heat shields, fuel tanks, or areas that may pinch or damage the wire.

7. Route the Driver-Side T-Connector:

   • Route the harness containing the yellow wire underneath the vehicle and up through the opening between the vehicle bumper and body into the driver-side taillight pocket.

8. Connect the Driver-Side T-Connector:

   • Insert the T-One® Connector end with the yellow wire between the vehicle wiring connectors and lock it in place.

9. Connect the Power Wire:

   • 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 12-gauge wire using the provided yellow butt connector.

10. Route the Power Wire:

    • Starting from the front of the vehicle, route the black 12-gauge wire rearward along the frame rail, avoiding areas that may pinch, cut, or damage the wire.

11. Connect the Power Wire to the Black Box:

    • Attach the black 12-gauge wire to the black power wire on the T-One® Connector black box using the provided yellow butt connector.

12. 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.

13. Reassemble the Vehicle:

    • Reinstall all plastic trim panels, thresholds, and other components removed during installation.
    • Ensure no wires are pinched or damaged.

14. Secure the Harness:

    • Mount the trailer tow harness in an accessible location with a bracket or electrical box.
    • Secure all loose wires with cable ties to avoid damage.

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.

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.