Installation Instructions for T-One® T-Connector for Jeep Wrangler and Jeep Gladiator

Part Numbers:

• 118786

Tools Required:

• Trim Panel Remover
• 10mm Socket & Ratchet or Wrench
• Drill (3/32” Drill Bit)
• 1/4” Socket
• Wire Crimpers
• Wire Cutters
• Phillips Head Screwdriver
• Test Probe
• 8mm Socket & Ratchet or Wrench

Step-by-Step Instructions:

For Jeep Wrangler:

1. Access Taillight Bolts:

   • Open the rear door to access the rear bolt holding the taillight.
   • Remove the small square access cover located on the trim panel below the side windows using a trim panel remover to expose the white bolt.

2. Remove Taillight Assemblies:

   • Using a 10mm socket, remove the white bolt holding the taillight in place.
   • Carefully pull the taillight away from the vehicle to expose the vehicle’s taillight wiring harness.
   • Repeat the process for the passenger side.

For Jeep Gladiator:

1. Access Taillight Bolts:
   • Open the rear tailgate to access the bolts securing the taillights.
   • Remove the two bolts and carefully pull the taillight housings rearward, being cautious not to break the alignment tabs.

For All Vehicles:

1. Locate the Taillight Wiring Harness:

   • On both sides of the vehicle, locate the taillight wiring harness. The harness will have a connection point matching the ends of the T-One® Connector.
   • Separate the connectors carefully, ensuring not to damage the locking tabs. Ensure all connectors are clean.

2. Connect Driver-Side T-Connector:

   • Insert the T-One® Connector end with the yellow wire between the vehicle wiring connectors and lock into place. Ensure connectors are fully inserted.

3. Route the Harness:

   • Route the harness containing the green wire and 4-flat connector down the opening behind the driver-side taillight.
   • Route the green wire underneath the vehicle and up through the opening behind the passenger-side taillight.

   Warning: Avoid routing the wire near hot pipes, heat shields, or the fuel tank.

4. Connect Passenger-Side T-Connector:

   • Insert the T-One® Connector end with the green wire between the vehicle wiring connectors on the passenger side.

5. Ground the White Wire:

   • Locate a suitable grounding point near the connector on the driver’s side.
   • Clean the surface 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.

6. Connect 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, avoiding hot pipes and sharp edges.

7. Connect to the Battery:

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

   Warning: Follow all warnings on the tow vehicle’s battery.

8. 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.

9. Mount the Black Box Module:

   • Locate a flat surface and mount the black box module to prevent damage or rattling.

10. Secure the Wiring Harness:

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

11. Reinstall Taillight Assemblies:

    • Reinstall the taillight assemblies and other items removed during installation, ensuring no wires are pinched or damaged.

12. Store the 4-Flat Connector:

    • Route the 4-flat harness to the center of the vehicle and mount it 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.

Installation Instructions for 4-Way to 7-Way Adapter and Brake Control Wiring (Economy Version)

Tools Required:

• Phillips Head Screwdriver
• Drill with 3/32" Drill Bit
• Wire Crimpers
• Wire Cutters
• Test Light or Multimeter
• Cable Ties

Part 1: Install the 4-Way to 7-Way Adapter

Step-by-Step Instructions:

1. Mount the Adapter:

   • Choose a suitable mounting point on the vehicle near the hitch.
   • Use a bracket (sold separately) to secure the adapter.

2. Connect the 4-Flat Plug:

   • Plug the 4-flat connector from the adapter into the existing 4-flat plug on the vehicle.
   • This connection provides tail lights, left turn, and right turn functions.

3. Ground the Adapter:

   • Locate a solid grounding point near the adapter (e.g., frame or cross member).
   • Clean the area to ensure good contact and secure the large white wire with the provided eyelet and screw.

4. Leave Additional Wires Disconnected:

   • The blue wire (brake control) will remain disconnected at this stage.
   • No additional power or reverse light connections are included with this economy kit.

5. Test Initial Connection:

   • Verify functionality of the 4-way circuits (tail lights and turn signals) using a test light or trailer.

Part 2: Install the Brake Control Wiring Kit

Wire Functions:

• Red Wire: Connects to the cold side of the stoplight switch (active only when the brake pedal is pressed).
• Black Wire: Connects to the battery (+) via the 20A in-line fuse.
• White Wire: Ground (-) to the vehicle frame or negative battery terminal.
• Blue Wire: Connects to the blue wire from the 7-way adapter for trailer brakes.

Step-by-Step Instructions:

1. Disconnect the Battery:

   • Disconnect the negative (-) battery cable before beginning installation.

2. Mount the Brake Controller:

   • Secure the brake controller under the dash on a firm surface within reach of the driver.

3. Route and Connect Wires:

   • Red Wire:
     • Locate the stoplight switch under the dashboard.
     • Use the provided wire tap to connect the red wire to the cold side of the stoplight switch.
   • Black Wire:
     • Connect one end of the black wire to the positive battery terminal using a ring terminal.
     • Insert the provided 20A in-line fuse between the battery and the brake controller.
   • White Wire:
     • Connect the white wire to a solid ground point on the vehicle’s chassis or directly to the negative battery terminal.
   • Blue Wire:
     • Route the blue wire to the 7-way adapter and connect it to the blue wire from the adapter.

4. Secure the Wiring:

   • Use cable ties to secure all wires, avoiding hot or moving parts.
   • Pass wires through existing grommets or add a grommet/silicone to insulate wires passing through metal surfaces.

5. Reconnect the Battery:

   • Reattach the negative (-) battery cable.

6. Test the System:

   • Verify functionality of the brake controller using a trailer or test light.
   • Ensure proper brake signal is sent to the trailer.

Notes:

• This economy kit does not include a dedicated power circuit for accessories or battery charging via the 7-way connector.
• The blue wire from the 7-way adapter is used exclusively for trailer brake control.
• Always verify all connections before use and follow safety guidelines during installation.

Warning: Improper installation or overloaded circuits can result in damage or fire. Test all connections carefully.

Installation Instructions for Jeep Wrangler JL and Jeep Gladiator

Part Numbers:

• 307300

Wiring Access Location:

• Under dash, left of the steering column, near the emergency brake pedal

Tools Required:

• None

Step-by-Step Instructions:

Step 1: Locate the vehicle brake control harness connector

• Find the 4-pin electric brake control harness connector under the dash, to the left of the steering column.
• It will be taped to another harness near the emergency brake pedal and will mate with the brake control adapter.

Step 2: Connect the brake control adapter

• Plug the brake control adapter into the vehicle’s electric controller connector.
• Use butt connectors to attach the adapter wires to the corresponding wires on the electric brake control, following the brake control manufacturer’s instructions.

Step 3: Complete installation and mount the brake control unit

• Complete the installation using the manufacturer’s instructions.
• Mount the brake control unit as directed.
• Perform the recommended test procedures to verify functionality.

Safety Notes:

• Vehicles not equipped with an OEM trailer tow package may require fuses and relays to complete output and battery feed circuits (sold separately).
• Consult the owner’s manual for specific fuse and relay locations.
• Do not exceed the towing manufacturer’s rating or the following limits:
  • Maximum 4 axles: 8 brakes (24 amps).
• Always wear safety glasses and follow all safety precautions during installation.
• Overloading circuits can cause fires.

Additional Information:

• For California compliance when using Part Number 307300, additional Kit 30235-P is required.
• Failure to comply with California regulations may result in liability for the user.

Installation and Operation Instructions for Electronic Brake Control

Part Numbers:

• Included Brake Control Unit: Part Number N8507120

Tools Required:

• Drill with 1/8" bit.
• Screwdriver or 1/4" nut driver.
• Wire connector crimp tool.
• Probe-type circuit tester.
• Assorted end wrenches.
• Wire cutter/stripper.

Safety Notes:

• Ensure the area behind the panel is clear before drilling.
• Follow all instructions to prevent damage to the unit or injury during installation.
• Avoid using RF-generating devices closer than 12 inches to the brake control.
• Always verify proper electrical connections.

Hardware List:

• Brake Control Unit.
• Mounting Bracket.
• (4) Mounting Screws.
• Additional Materials Required:
  • 10 Ga. wire.
  • 30 Amp auto-reset circuit breaker.
  • Assorted ring terminal & butt connectors.
  • 4" cable ties (6-10).

Installation Instructions:

Mounting the Unit:

1. Choose a Suitable Location:
   • Ensure a secure, solid surface.
   • Ensure the unit is within easy reach of the driver.
   • Verify the area behind the panel is clear.
2. Mark and Drill Holes:
   • Use the bracket as a template to mark hole locations.
   • Drill two 1/8" diameter holes.
3. Attach the Bracket:
   • Secure the bracket using two self-tapping screws provided.
   • Avoid over-tightening to prevent damage to the holes.
4. Mount the Brake Control Unit:
   • Attach the control unit to the bracket with the remaining screws.

Wiring and Connections:

• Black Wire: Connect to the vehicle's power supply.
• Red Wire: Connect to the stoplight signal.
• White Wire: Connect to the vehicle's ground.
• Blue Wire: Connect to the trailer brakes.

Initial Setup:

1. With the trailer connected, press and hold the brake pedal.
2. Adjust the Output (Gain) Control to approximately 2.0 using the digital display.
3. Adjust the Sync Control to a setting of 4°.
4. Test the brake application by driving in an open area and using the manual slide control.

Sync and Output (Gain) Adjustments:

• Sync Control: Adjust the aggressiveness of trailer braking.
  • Sync settings range from 0° (least aggressive) to 9° (most aggressive).
• Output (Gain) Control: Adjust the maximum power delivered to the brakes.
  • Output ranges from 0 to 10, with 10 being maximum braking power.

Testing and Fine-Tuning:

1. Conduct a test drive at low speeds in a clear area.
2. Use the Manual Slide Control to apply trailer brakes and adjust the Gain as needed.
3. Verify smooth stops without jerking or locking the brakes.
4. Adjust Sync settings for road conditions and driver preferences.

Maintenance:

• Regularly inspect all connections and wires for damage or wear.
• Keep the unit clean and free of debris.
• Periodically check and tighten all mounting screws.

Troubleshooting Guide:

Warranty Information:

• Limited Lifetime Warranty:
  • Covers defects in materials and workmanship.
  • Excludes damage caused by misuse or improper installation.
• For complete warranty instructions, please download the full installation PDF.

Technical Support:

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.

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.