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

Tools Required:

• Phillips Head Screwdriver
• Drill with 3/32" Drill Bit
• 10mm Socket & Ratchet or Wrench
• 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, typically near the hitch.
   • Use the provided bracket and screws to secure the adapter.

2. Connect the 4-Flat Plug:

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

3. Ground the Adapter:

   • Locate a clean, solid grounding point near the adapter.
   • Drill a 3/32" hole if necessary and secure the white ground wire from the adapter using the provided screw and eyelet.

4. Leave Additional Wires Disconnected:

   • The following wires will remain disconnected until Part 2:
     • Black Wire: Power from the battery.
     • Blue Wire: Brake control output.
     • Yellow Wire: Reverse light (optional; leave disconnected unless needed).

5. Test Initial Connection:

   • Use a test light or trailer to verify functionality of the 4-way connections (tail lights, turn signals).

Part 2: Install Brake Control Wiring

Step-by-Step Instructions:

1. Mount Circuit Breakers:

   • Install two 30A circuit breakers on the firewall or another suitable location near the battery.
   • Use self-tapping screws to mount them securely.

2. Route Power Wires:

   • Connect the black 12-gauge wire from the 7-way adapter to the auxiliary side of one circuit breaker (this powers the 7-way socket).
   • Run a heavy-gauge wire from the battery's positive terminal to the battery side of this circuit breaker, using a ring terminal.
   • Run another heavy-gauge wire from the battery's positive terminal to the auxiliary side of the second circuit breaker (for the brake controller).

3. Install the Brake Controller:

   • Mount the brake controller under the dash on a firm surface.
   • Use the following connections:
     • Red Wire: Connect to the cold side of the brake switch (active only when the brake pedal is pressed).
     • Blue Wire: Connect to the blue wire on the 7-way adapter for trailer brakes.
     • White Wire: Connect to a solid ground point on the vehicle body.
     • Black Wire: Connect to the auxiliary side of the second 30A circuit breaker (provides power to the brake controller).

4. Optional: Connect Reverse Light Circuit:

   • If the trailer has a reverse light circuit, connect the yellow wire from the 7-way adapter to the vehicle’s reverse light circuit.

5. Reconnect the Battery:

   • Reattach the negative battery cable and ensure all connections are secure.
   • Insert the fuses into both circuit breakers.

6. Secure All Wires:

   • Use cable ties to secure all loose wires and prevent damage or rattling.

7. Test the System:

   • Verify functionality of all circuits (running lights, turn signals, brake lights, and brake controller output).
   • If applicable, test the reverse light circuit.

Notes:

• Most installations will only require connecting the black and blue wires from the 7-way adapter.
• Leave the yellow wire disconnected unless the trailer has a reverse light or surge brake lockout circuit.
• Always adhere to safety guidelines and verify all connections before use.

Warning: Incorrect wiring can cause damage to the vehicle or trailer. Test all connections carefully before use.