Trailer Wiring and Bracket For 07‑12 Lexus RX350 04‑06 RX330 Plug & Play 4‑Flat Harness
Model: 118478 118144Plug and Play T-One Wiring Harness Connector
4-Flat Mounting Bracket
Installation Instructions
Fits The Following Vehicles:
2007 - 2012 Lexus, RX350, All Styles
Wiring Kit Specs:
| Part Number | 118478 |
| Brand | Tekonsha |
| Warranty | 1 Year |
| Installation Instructions |  |
| Part Number | 118144 |
| Fits | 4 Flat Connectors |
| Brand | Tow Ready |
| Mounts electrical connector to attachment bracket Includes screws and nuts Attractive point-of-purchase packaging |
|
| Warranty | 1 Year |
Questions or Comments? Call 702-374-8999
Thank you for choosing Tekonsha, the most powerful name in trailer light wiring and brake control system. Our trailer wiring harness is vehicle specific, requires no splicing or cutting of the wires. Simply plug & play and your vehicle will be able to control trailers brake, turn and running lights. Trailer wiring kit comes with a 1 year warranty and everything necessary to install the trailer plug wiring. Tekonsha manufactures a wider range of different products for hooking up trailer lights to your Car Truck or SUV. T-One connectors work great with boat trailer wiring and utility trailer wiring. Typically those trailers will use the standard 4 flat plug which is what our T One connectors offer. If you have an RV Fifth Wheel or any other large type of trailer you will us a 7 pin trailer plug to control your electric trailer brakes. Tekonsha offers 7 pin trailer connector as well. Simply do a search above to see if there is a 7 wire trailer wiring available for hooking up your 7 way. If there is not you can use part number 85343 trailer wiring adapter to convert any 4-Flat into a 7-Way. In addition you will use part number 20506 which will include the rest of wiring needed for electric brake controls. You can also call us or email us any time and we will be able to provide information you need.
Partial list of fitment years:
04 05 06 07 08 09 10 11 12 2004 2005 2006 2007 2008 2009 2010 2011 2012
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Product Details
- Brand: Tekonsha
- Model: 118478 118144
- Includes: T-One T-Connector Custom Harness, Mounting Bracket
Compatibility Chart
Description
Plug and Play T-One Wiring Harness Connector
4-Flat Mounting Bracket
Installation Instructions
Fits The Following Vehicles:
2007 - 2012 Lexus, RX350, All Styles
Wiring Kit Specs:
| Part Number | 118478 |
| Brand | Tekonsha |
| Warranty | 1 Year |
| Installation Instructions | |
| Part Number | 118144 |
| Fits | 4 Flat Connectors |
| Brand | Tow Ready |
| Mounts electrical connector to attachment bracket Includes screws and nuts Attractive point-of-purchase packaging |
|
| Warranty | 1 Year |
Questions or Comments? Call 702-374-8999
Thank you for choosing Tekonsha, the most powerful name in trailer light wiring and brake control system. Our trailer wiring harness is vehicle specific, requires no splicing or cutting of the wires. Simply plug & play and your vehicle will be able to control trailers brake, turn and running lights. Trailer wiring kit comes with a 1 year warranty and everything necessary to install the trailer plug wiring. Tekonsha manufactures a wider range of different products for hooking up trailer lights to your Car Truck or SUV. T-One connectors work great with boat trailer wiring and utility trailer wiring. Typically those trailers will use the standard 4 flat plug which is what our T One connectors offer. If you have an RV Fifth Wheel or any other large type of trailer you will us a 7 pin trailer plug to control your electric trailer brakes. Tekonsha offers 7 pin trailer connector as well. Simply do a search above to see if there is a 7 wire trailer wiring available for hooking up your 7 way. If there is not you can use part number 85343 trailer wiring adapter to convert any 4-Flat into a 7-Way. In addition you will use part number 20506 which will include the rest of wiring needed for electric brake controls. You can also call us or email us any time and we will be able to provide information you need.
Partial list of fitment years:
04 05 06 07 08 09 10 11 12 2004 2005 2006 2007 2008 2009 2010 2011 2012
Get Expert Help
Trailer Wiring and Bracket For 07-12 Lexus RX350 04-06 RX330 Plug & Play 4-Flat Harness Install Notes
Installation Instructions for T-Connector Adapter for Lexus RX 330 and Lexus RX 350
Part Numbers:
- 118478
Wiring Access Location:
- Rear interior trim panels near the cargo area.
Tools Required:
- Drill (3/32” drill bit)
- Philips head screwdriver
- Test probe
- Trim panel puller
- Wire crimpers
- Wire cutters
Step-by-Step Instructions:
-
Access Rear Wiring:
- Open the rear hatch.
- Temporarily remove the rear threshold plate, storage covers, and floor covering.
-
Remove Trim Panels:
- Partially remove the rear interior trim panels on both the driver’s and passenger’s sides of the vehicle.
- Remove several trim panel fasteners to detach the panels.
- Set aside all removed parts carefully to avoid damage.
-
Locate Vehicle Wiring Harness:
- On both sides of the vehicle, locate the taillight wiring harness.
- This harness will have a connection point matching the ends of the T-Connector.
- Separate the connector, ensuring the locking tabs are not broken. Clean all connector surfaces of dirt and debris.
-
Install T-Connector:
- On the driver’s side, insert the T-Connector end with the yellow wire between the vehicle wiring connectors. Lock it into place.
- Ensure the connectors are fully inserted and the locking tabs are secure.
- Route the T-Connector end with the green/red wires to the passenger’s side, behind the panels and along the threshold. Repeat step 4 for the passenger side.
-
Ground Connection:
- Locate a suitable grounding point near the connector, such as the vehicle’s frame or cross member.
- Clean the area 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 to avoid damage or injury. Do not drill into exposed surfaces.
-
Connect Power Wires:
- From inside the vehicle, connect the black 12-gauge wire and the red wire from the T-Connector black box using the supplied yellow butt connector.
- Route the black wire through a grommet and along the exterior frame, or follow the existing wiring along the thresholds into the engine compartment, up to the battery. Avoid areas that may pinch or damage the wire.
-
Connect to Battery:
- Disconnect the vehicle’s negative (-) battery cable.
- Cut the yellow fuse holder wire and attach the ring terminal. Secure the ring terminal to the vehicle’s positive (+) battery cable.
- Connect the other end of the fuse holder to the black 12-gauge wire using the yellow butt connector.
-
Reconnect Battery and Fuse:
- Reconnect the negative (-) battery cable.
- Insert the 10-amp fuse into the fuse holder.
-
Mount Converter Box:
- Locate a flat surface on the driver’s side and mount the T-Connector black converter box using the provided double-sided tape.
- Secure the remaining harness with the cable ties provided to prevent damage or rattling.
-
Reassemble and Test:
- Reinstall the plastic trim panels, threshold, storage covers, and floor covering removed during installation. Ensure no wires are pinched or cut.
- Test the installation with a test light or trailer. Reset the vehicle’s electrical system by temporarily removing the key from the ignition.
Specifications:
- Max. stop/turn light: 1 per side (2.1 amps).
- Max. tail lights: (5.6 amps).
Hardware List:
- T-Connector adapter
- Eyelet and screw
- Double-sided tape
- Cable ties
Safety Notes:
- All connections must be complete for the T-Connector to function properly.
- Overloading circuits can cause fires. Do not exceed the lower of the towing manufacturer’s rating or the unit specifications.
Manufacturer Notes:
- Follow all vehicle warnings and installation instructions.
- Use a test light or trailer to confirm proper installation.
- Refer to the vehicle owner’s manual for additional details.
Installation Instructions for T-Connector Adapter for Vehicle
Part Numbers:
- 118478
Wiring Access Location:
- Rear interior trim panels near the cargo area.
Tools Required:
- Drill (3/32” drill bit)
- Philips head screwdriver
- Test probe
- Trim panel puller
- Wire crimpers
- Wire cutters
Step-by-Step Instructions:
-
Access Rear Wiring:
- Open the rear hatch.
- Temporarily remove the rear threshold plate, storage covers, and floor covering.
-
Remove Trim Panels:
- Partially remove the rear interior trim panels on both the driver’s and passenger’s sides of the vehicle.
- Remove several trim panel fasteners to detach the panels.
- Set aside all removed parts carefully to avoid damage.
-
Locate Vehicle Wiring Harness:
- On both sides of the vehicle, locate the taillight wiring harness.
- This harness will have a connection point matching the ends of the T-Connector.
- Separate the connector, ensuring the locking tabs are not broken. Clean all connector surfaces of dirt and debris.
-
Install T-Connector:
- On the driver’s side, insert the T-Connector end with the yellow wire between the vehicle wiring connectors. Lock it into place.
- Ensure the connectors are fully inserted and the locking tabs are secure.
- Route the T-Connector end with the green/red wires to the passenger’s side, behind the panels and along the threshold. Repeat step 4 for the passenger side.
-
Ground Connection:
- Locate a suitable grounding point near the connector, such as the vehicle’s frame or cross member.
- Clean the area 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 to avoid damage or injury. Do not drill into exposed surfaces.
-
Connect Power Wires:
- From inside the vehicle, connect the black 12-gauge wire and the red wire from the T-Connector black box using the supplied yellow butt connector.
- Route the black wire through a grommet and along the exterior frame, or follow the existing wiring along the thresholds into the engine compartment, up to the battery. Avoid areas that may pinch or damage the wire.
-
Connect to Battery:
- Disconnect the vehicle’s negative (-) battery cable.
- Cut the yellow fuse holder wire and attach the ring terminal. Secure the ring terminal to the vehicle’s positive (+) battery cable.
- Connect the other end of the fuse holder to the black 12-gauge wire using the yellow butt connector.
-
Reconnect Battery and Fuse:
- Reconnect the negative (-) battery cable.
- Insert the 10-amp fuse into the fuse holder.
-
Mount Converter Box:
- Locate a flat surface on the driver’s side and mount the T-Connector black converter box using the provided double-sided tape.
- Secure the remaining harness with the cable ties provided to prevent damage or rattling.
-
Reassemble and Test:
- Reinstall the plastic trim panels, threshold, storage covers, and floor covering removed during installation. Ensure no wires are pinched or cut.
- Test the installation with a test light or trailer. Reset the vehicle’s electrical system by temporarily removing the key from the ignition.
Specifications:
- Max. stop/turn light: 1 per side (2.1 amps).
- Max. tail lights: (5.6 amps).
Hardware List:
- T-Connector adapter
- Eyelet and screw
- Double-sided tape
- Cable ties
Safety Notes:
- All connections must be complete for the T-Connector to function properly.
- Overloading circuits can cause fires. Do not exceed the lower of the towing manufacturer’s rating or the unit specifications.
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:
- This product is covered by a [warranty period]. 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.
Manufacturer Notes:
- Follow all vehicle warnings and installation instructions.
- Use a test light or trailer to confirm proper installation.
- Refer to the vehicle owner’s manual for additional details.
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