Installation Instructions for T-One® T-Connector for RAM Promaster City

Part Numbers:

• 118719

Tools Required:

• Phillips Head Screwdriver
• Drill (3/32” Drill Bit)
• Trim Panel Remover
• Test Probe
• Wire Crimpers
• Wire Cutters

Step-by-Step Instructions:

1. Remove the Taillights:

   • Open the rear door. Begin with the driver’s side by removing two bolts and carefully pulling the taillight housing rearward away from the vehicle, avoiding damage to the alignment tabs. Repeat on the passenger side.

2. Disconnect the Wiring Harness:

   • Locate the taillight wiring harness on both the driver and passenger sides. Disconnect the connectors, ensuring the locking tabs are not damaged. Clean all connectors to ensure a secure connection.

3. Connect the Passenger-Side T-Connector:

   • On the passenger side, plug the T-One® T-Connector harness containing the green wire between the vehicle’s mating connectors.

4. Route the Driver-Side T-Connector:

   • Route the T-Connector harness containing the yellow wire behind the fascia and door hinge bracket.
   • Continue routing behind the fascia across the vehicle to the driver’s side, hiding the wire behind the top of the bumper fascia while routing. Once routed, position the wire behind the fascia and door hinge bracket to the taillight pocket area.

   Warning: Avoid areas that may pinch, cut, or damage the wire.

5. Connect the Driver-Side T-Connector:

   • Repeat step 3 for the T-Connector end with the yellow wire on the driver’s side.

6. Ground the White Wire:

   • Locate a suitable grounding point near the connector. Drill a 3/32” hole and secure the white wire using the provided eyelet and screw.

   Caution: Verify the area behind the surface before drilling to avoid damage or injury.

7. Route the 4-Flat Connector:

   • On the passenger side, remove the access panel and route the 4-flat connector through the access hole in the taillight pocket area, exiting it through the area where the access panel was removed.

8. Mount the Black Box:

   • Clean a flat area behind the passenger-side taillight assembly with a mixture of rubbing alcohol and water.
   • Mount the black box in this area using the provided double-sided tape, ensuring it is positioned with the epoxy side facing downward to prevent water accumulation.

9. Connect the Power Wire:

   • Locate the black 12-gauge power wire from the T-One® T-Connector black box. Connect it to the black power wire on the black box using the yellow butt connector.
   • Route the black wire through a grommet and along the exterior frame or follow existing wiring along the thresholds to the engine compartment, avoiding areas that may pinch or damage the wire.

10. Connect to the Vehicle Battery:

    • Disconnect the vehicle’s negative (-) battery cable.
    • Remove the fuse from the yellow fuse holder.
    • Attach the ring terminal to the positive (+) battery cable.
    • Connect the other end of the fuse holder to the black wire using the yellow butt connector.
    • Insert the 15-amp fuse into the fuse holder.

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

11. Secure the Wiring:

    • Use the provided cable ties to secure the T-Connector harness, ensuring it is away from areas that could pinch, cut, or melt the wire.

12. Reinstall Components:

    • Reinstall the taillight assemblies and the access panel removed in earlier steps.
    • Store the 4-flat connector in the rear cargo area when not in use.

Specifications:

• Max. stop/turn light: 2 per side (4.2 amps)
• Max. tail lights: 7.5 amps

Safety Notes:

• Overloading circuits can cause fires. Do not exceed stated product ratings or vehicle manufacturer specifications.
• 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.

Installation Instructions for T-One® T-Connector for RAM Promaster City

Part Numbers:

• 118719

Tools Required:

• Phillips Head Screwdriver
• Drill (3/32” Drill Bit)
• Trim Panel Remover
• Test Probe
• Wire Crimpers
• Wire Cutters

Step-by-Step Instructions:

1. Remove the Taillights:

   • Open the rear door. Begin with the driver’s side by removing two bolts and carefully pulling the taillight housing rearward away from the vehicle, avoiding damage to the alignment tabs. Repeat on the passenger side.

2. Disconnect the Wiring Harness:

   • Locate the taillight wiring harness on both the driver and passenger sides. Disconnect the connectors, ensuring the locking tabs are not damaged. Clean all connectors to ensure a secure connection.

3. Connect the Passenger-Side T-Connector:

   • On the passenger side, plug the T-One® T-Connector harness containing the green wire between the vehicle’s mating connectors.

4. Route the Driver-Side T-Connector:

   • Route the T-Connector harness containing the yellow wire behind the fascia and door hinge bracket.
   • Continue routing behind the fascia across the vehicle to the driver’s side, hiding the wire behind the top of the bumper fascia while routing. Once routed, position the wire behind the fascia and door hinge bracket to the taillight pocket area.

   Warning: Avoid areas that may pinch, cut, or damage the wire.

5. Connect the Driver-Side T-Connector:

   • Repeat step 3 for the T-Connector end with the yellow wire on the driver’s side.

6. Ground the White Wire:

   • Locate a suitable grounding point near the connector. Drill a 3/32” hole and secure the white wire using the provided eyelet and screw.

   Caution: Verify the area behind the surface before drilling to avoid damage or injury.

7. Route the 4-Flat Connector:

   • On the passenger side, remove the access panel and route the 4-flat connector through the access hole in the taillight pocket area, exiting it through the area where the access panel was removed.

8. Mount the Black Box:

   • Clean a flat area behind the passenger-side taillight assembly with a mixture of rubbing alcohol and water.
   • Mount the black box in this area using the provided double-sided tape, ensuring it is positioned with the epoxy side facing downward to prevent water accumulation.

9. Connect the Power Wire:

   • Locate the black 12-gauge power wire from the T-One® T-Connector black box. Connect it to the black power wire on the black box using the yellow butt connector.
   • Route the black wire through a grommet and along the exterior frame or follow existing wiring along the thresholds to the engine compartment, avoiding areas that may pinch or damage the wire.

10. Connect to the Vehicle Battery:

    • Disconnect the vehicle’s negative (-) battery cable.
    • Remove the fuse from the yellow fuse holder.
    • Attach the ring terminal to the positive (+) battery cable.
    • Connect the other end of the fuse holder to the black wire using the yellow butt connector.
    • Insert the 15-amp fuse into the fuse holder.

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

11. Secure the Wiring:

    • Use the provided cable ties to secure the T-Connector harness, ensuring it is away from areas that could pinch, cut, or melt the wire.

12. Reinstall Components:

    • Reinstall the taillight assemblies and the access panel removed in earlier steps.
    • Store the 4-flat connector in the rear cargo area when not in use.

Specifications:

• Max. stop/turn light: 2 per side (4.2 amps)
• Max. tail lights: 7.5 amps

Safety Notes:

• Overloading circuits can cause fires. Do not exceed stated product ratings or vehicle manufacturer specifications.
• 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.

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.

Warranty Information:

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

Note: Store the 4-flat connector in the rear cargo area when not in use to prevent damage.