Product Details
- Brand: Tekonsha
- Model: 118335 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 96-99 Chevy Express GMC Savana 1500 2500 3500 Plug Prong Pin Brake Control Ready Install Notes
Installation Instructions for T-Connector Adapter
Part Numbers:
- 118335
Wiring Access Location:
- Tail light wiring harness near the rear interior trim panels on both sides of the vehicle.
Tools Required:
- Screw or cable tie (provided in the kit).
Step-by-Step Instructions:
-
Remove the rear interior trim panels near the doors.
- Locate the vehicle’s tail light wiring harness.
- There will be connection points on each side of the vehicle matching the ends of the T-Connector adapter.
-
Disconnect the vehicle’s wiring harness connectors on the driver’s side.
- Note: Be careful not to damage the locking tabs.
-
Position the black box on the left (driver’s) side of the vehicle.
- Plug the T-Connector harness connector containing the yellow wire into the left vehicle wiring harness connector.
- Ensure that the connectors are fully inserted together, utilizing the existing and supplied locking tabs.
-
Repeat the above procedure on the passenger side using the connector containing the green wire.
-
Tuck the green wire under the floor trim (threshold) panel.
-
Secure the black box on the driver’s side behind the trim panel using a screw or cable tie.
-
Replace the vehicle’s rear trim panels.
-
Specifications:
- This unit is rated for 4 amps per circuit.
-
Hardware List:
- T-Connector adapter.
- Black box.
- Screw or cable tie.
Safety Notes:
- Handle all connectors with care to avoid damage.
- Ensure all connections are clean and securely fastened.
- Test the installation after completing all steps to verify functionality.
Manufacturer Notes:
- Follow all warnings and instructions provided with the product.
- Use a test light or trailer to confirm proper installation.
Installation Instructions for T-Connector Adapter
Part Numbers:
- 118335
Wiring Access Location:
- Tail light wiring harness near the rear interior trim panels on both sides of the vehicle.
Tools Required:
- Screw or cable tie (provided in the kit)
Step-by-Step Instructions:
-
Remove Rear Interior Trim Panels:
- Remove the rear interior trim panels near the doors.
- Locate the vehicle’s tail light wiring harness.
- There will be connection points on each side of the vehicle matching the ends of the T-Connector adapter.
-
Disconnect the Vehicle’s Wiring Harness Connectors on the Driver’s Side:
- Note: Be careful not to damage the locking tabs.
-
Position the Black Box:
- Position the black box on the left (driver’s) side of the vehicle.
- Plug the T-Connector harness connector containing the yellow wire into the left vehicle wiring harness connector.
- Ensure that the connectors are fully inserted together, utilizing the existing and supplied locking tabs.
-
Repeat for the Passenger Side:
- Repeat the above procedure on the passenger side using the connector containing the green wire.
-
Secure the Wiring and Replace Trim Panels:
- Tuck the green wire under the floor trim (threshold) panel.
- Secure the black box on the driver’s side behind the trim panel using a screw or cable tie.
- Replace the vehicle’s rear trim panels.
Specifications:
- Maximum Current Rating: 4 amps per circuit
Hardware List:
- T-Connector adapter
- Black box
- Screw or cable tie
Safety Notes:
- Handle all connectors with care to avoid damage.
- Ensure all connections are clean and securely fastened.
- Test the installation after completing all steps to verify functionality.
Additional Information:
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.
Warranty Information:
For complete warranty instructions, please download the full installation PDF.
Note: Follow all warnings and instructions provided with the product. Use a test light or trailer to confirm proper installation.
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.