Troubleshooting Trailer Harness On 2004 Toyota Highlander
Updated 08/10/2015 | Published 08/08/2015
Products Featured in This Question
Question:
2004 Highlander V6 I tried to ohm out through from connector to connector and got no reading on of the flow through wires, eg: g-g, w-w, b-b, y-y. i was using the lowest and highest ohm setting. Should I be able to ohm the unit. I have no idea where to check on the Highlander wiring. Ive have the exact same problem on a different trailer last week. Is there any way to check the cabling?
asked by: Rich N
Helpful Expert Reply:
If the lights are not working on your trailer and you are unable to find any current at the vehicle side connector it sounds like you may have a blown fuse. Per the installation instructions for the T-One Vehicle Wiring Harness for Factory Tow Package, part # 118248, you will need to find the towing fuse and insert the included 10-amp fuse.
Look in the engine compartment for the fuse. From my research I found that the towing fuse is in position 11. Check the fuse to make sure it is good and replace if needed. If the fuse is blown, you will need to find what is causing the problem. Look for broken, worn or damaged wires or pins on the connectors and repair as needed or you will run the risk of blowing more fuses.
If the fuse checks out okay, you can use a circuit tester like part #PTW2993 to test each of the pins in the 4-way connector for function. If you are getting no current at the 4-way, then the problem is with the wiring between the 4-way harness and the connection point behind the access panel in the rear cargo area on the driver side.
Product Page this Question was Asked From
T-One Vehicle Wiring Harness for Factory Tow Package - 4-Pole Flat Trailer Connector
- Custom Fit Vehicle Wiring
- Trailer Hitch Wiring
- Vehicle End Connector
- Powered Converter
- Factory Tow Package
- 4 Flat
- Plug and Lead
- Plug-In
- Hidden
- Tekonsha
more information >
Featured Help Information
Instructions
Miscellaneous Media
Continue Researching
- Shop: Trailer Wiring
- Shop: Trailer Hitch
- Shop: Curt T-Connector Vehicle Wiring Harness for Factory Tow Package - 4-Pole Flat Trailer Connector
- Shop: etrailer Trailer Hitch Receiver - Custom Fit - Matte Black Finish - Class III - 2"
- Q&A: Difference Between Curt and etrailer Trailer Hitch Receivers for 2020 Chevy Colorado
- Search Results: hitch installation
- Shop: Curt Powered Tail Light Converter with 4-Pole Flat Trailer Connector
- Shop: Curt Trailer Hitch Receiver - Custom Fit - Class III - 2"
- Video: Mount: etrailer Trailer Hitch Receiver on a 2005 Toyota Highlander
- Video: Install: Curt Trailer Hitch Receiver on a 2004 Toyota Highlander
- Video: Best 2004 Toyota Highlander Trailer Hitch Options
- Video: Detailed Breakdown of the Curt T-Connector Vehicle Wiring Harness for Factory Tow Package
- Video: How to Install the Curt Trailer Hitch Receiver on a 2006 Toyota Highlander
- Shop: Curt T-Connector Vehicle Wiring Harness for Factory Tow Package - 4-Pole Flat Trailer Connector
- Shop: T-One Vehicle Wiring Harness with 4-Pole Flat Trailer Connector
- Video: How to Set Up Your T-One Vehicle Wiring Harness for Factory Tow Package on a 2004 Toyota Highlander
- Search Results: tail light kit
- Video: Mount: T-One Vehicle Wiring Harness with 4-Pole Flat Trailer Connector on a 2007 Toyota Tacoma
- Shop: T-One Vehicle Wiring Harness with 4-Pole Flat Trailer Connector
- Q&A: What is the Difference Between a Class II and a Class III Hitch?
- Article: Brake Controller 7- and 4-Way Installation Kit (ETBC7)
- Search Results: trailer hitch
- Q&A: What is the Difference Between a 4-Way and 7-Way Trailer Connector
- Search Results: trailer wiring
- Article: Trailer Wiring Diagrams
- Search Results: trailer hitch ball mount
- Article: How to Choose the Right Trailer Hitch Class
- Shop: Brake Controller
- Q&A: Difference Between Curt & etrailer Trailer Hitches For 2024 Subaru Crosstrek Wilderness
- Search Results: hitch
on Custom Fit Vehicle Wiring
