Product Details
- Brand: Tekonsha
- Model: 118411 85343 20506 7012A
- Includes: T-One T-Connector Custom Harness, Wiring Adapter, Trailer Brake Controller Installation Kit, Circuit Breaker
Compatibility Chart
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Trailer Hitch 7 Way RV Wiring Kit For 05-14 Volvo XC90 Plug Prong Pin Brake Control Ready Install Notes
Installation Instructions for T-Connector Adapter
Part Numbers:
- 118411
Tools Required:
- 10mm Socket & Ratchet or 10mm Wrench
- Trim Panel Remover
- Drill with a 3/32” Drill Bit
- Philips Head Screwdriver
Step-by-Step Instructions:
-
Prepare the Vehicle:
- Open the tailgate and remove the cargo door on the floor.
- Carefully remove the floor trim panels and access panels on each side of the vehicle.
- Set aside all items removed to avoid damage.
-
Locate the Taillight Wiring Harness:
- On both the driver’s and passenger’s sides, locate the vehicle's taillight wiring harness inside the access panel area.
- The harness will have a connection point matching the T-Connector ends.
- Separate the connectors carefully, ensuring not to break the locking tabs.
- Clean all connector surfaces of dirt.
-
Install the Driver-Side T-Connector:
- Insert the T-Connector end with the yellow wire between the vehicle wiring connectors on the driver’s side.
- Lock into place, ensuring the connectors are fully inserted and the locking tabs are secure.
-
Route the Passenger-Side T-Connector:
- Route the T-Connector end with the green wire through the trim panel access hole, across the threshold, and through the passenger trim panel access hole.
- Repeat Step 3 on the passenger’s side using the T-Connector harness with the green wire.
-
Ground the White Wire:
- Locate a suitable grounding point near the connector, such as the vehicle's frame or crossmember.
- Clean the grounding area to remove 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 avoid damage or injury.
- Do not drill into exposed surfaces.
-
Connect the Power Cable:
- Locate the power cable stud on the driver’s side.
- Using a wrench or socket, remove the nut and place the ring terminal with the yellow wire on the stud.
- Replace the nut and tighten.
- Install the 10-amp fuse into the fuse holder.
-
Mount the T-Connector Black Box:
- Clean a flat area in the driver’s side storage area with rubbing alcohol and water.
- Mount the T-Connector black box using the provided double-sided tape.
-
Secure the Harness:
- Use the provided cable ties to secure the remaining T-Connector harness to prevent damage or rattling.
- Avoid areas that could pinch, cut, or melt the wire.
-
Reassembly:
- Replace both access panels, floor trim panels, and the cargo door removed during installation.
-
Test the Installation:
- Verify the T-Connector functionality with a test light or trailer.
- Ensure all connections are complete for the T-Connector to function properly.
Specifications:
- Max. stop/turn light: 1 per side (2.1 amps)
- Max. tail lights: (5.6 amps)
Safety Notes:
- Overloading circuits can cause fires. Do not exceed the towing manufacturer’s rating or the unit specifications.
- Follow all warnings and installation instructions provided.
Manufacturer Notes:
- Store the 4-flat connector in the rear cargo area when not in use.
- Refer to the vehicle owner’s manual for additional details.
Installation Instructions for T-Connector Adapter
Part Numbers:
- 118411
Tools Required:
- 10mm Socket & Ratchet or 10mm Wrench
- Trim Panel Remover
- Drill with a 3/32” Drill Bit
- Philips Head Screwdriver
Step-by-Step Instructions:
-
Prepare the Vehicle:
- Open the tailgate and remove the cargo door on the floor.
- Carefully remove the floor trim panels and access panels on each side of the vehicle.
- Set aside all items removed to avoid damage.
-
Locate the Taillight Wiring Harness:
- On both the driver’s and passenger’s sides, locate the vehicle's taillight wiring harness inside the access panel area.
- The harness will have a connection point matching the T-Connector ends.
- Separate the connectors carefully, ensuring not to break the locking tabs.
- Clean all connector surfaces of dirt.
-
Install the Driver-Side T-Connector:
- Insert the T-Connector end with the yellow wire between the vehicle wiring connectors on the driver’s side.
- Lock into place, ensuring the connectors are fully inserted and the locking tabs are secure.
-
Route the Passenger-Side T-Connector:
- Route the T-Connector end with the green wire through the trim panel access hole, across the threshold, and through the passenger trim panel access hole.
- Repeat Step 3 on the passenger’s side using the T-Connector harness with the green wire.
-
Ground the White Wire:
- Locate a suitable grounding point near the connector, such as the vehicle's frame or crossmember.
- Clean the grounding area to remove 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 avoid damage or injury.
- Do not drill into exposed surfaces.
-
Connect the Power Cable:
- Locate the power cable stud on the driver’s side.
- Using a wrench or socket, remove the nut and place the ring terminal with the yellow wire on the stud.
- Replace the nut and tighten.
- Install the 10-amp fuse into the fuse holder.
-
Mount the T-Connector Black Box:
- Clean a flat area in the driver’s side storage area with rubbing alcohol and water.
- Mount the T-Connector black box using the provided double-sided tape.
-
Secure the Harness:
- Use the provided cable ties to secure the remaining T-Connector harness to prevent damage or rattling.
- Avoid areas that could pinch, cut, or melt the wire.
-
Reassembly:
- Replace both access panels, floor trim panels, and the cargo door removed during installation.
-
Test the Installation:
- Verify the T-Connector functionality with a test light or trailer.
- Ensure all connections are complete for the T-Connector to function properly.
Specifications:
- Max. Stop/Turn Light: 1 per side (2.1 amps)
- Max. Tail Lights: (5.6 amps)
Safety Notes:
- Overloading circuits can cause fires. Do not exceed the towing manufacturer’s rating or the unit specifications.
- Follow all warnings and installation instructions provided.
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.
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.
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:
-
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.
-
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.
-
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.
-
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).
- The following wires will remain disconnected until Part 2:
-
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:
-
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.
-
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).
-
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).
-
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.
-
Reconnect the Battery:
- Reattach the negative battery cable and ensure all connections are secure.
- Insert the fuses into both circuit breakers.
-
Secure All Wires:
- Use cable ties to secure all loose wires and prevent damage or rattling.
-
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.
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:
-
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.
-
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.
-
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.
-
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).
- The following wires will remain disconnected until Part 2:
-
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:
-
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.
-
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).
-
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).
-
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.
-
Reconnect the Battery:
- Reattach the negative battery cable and ensure all connections are secure.
- Insert the fuses into both circuit breakers.
-
Secure All Wires:
- Use cable ties to secure all loose wires and prevent damage or rattling.
-
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.
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.
Warranty Information:
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.