Troubleshooting 4-Pole Connector Not Testing for Turn Signals on 2002 Toyota Sequoia
Published 01/19/2016
Products Featured in This Question
Question:
I have a 4 prong wiring harness already installed. Battery tester shows power and all 3 lines steady no blinking for turn signals. All lights work on trailer/pop up I want to tow as I tested on my Dads pickup. When I plug in trailer to Sequoia, no lights come on. Where do I start trouble shooting to find the problem?
asked by: Ray C
Expert Reply:
If your 2002 Toyota Sequoia has a factory trailer tow package wiring that the 4-Pole connector is plugged in to, you can test the factory wiring to ensure it is functioning properly.
Unplugging the 4-Pole connector will provide access to the pins for the factory wiring. You will want to use a circuit tester, like # PTW2993, to test the pins on the factory wiring. They should test for taillights, right stop and turn, and left stop and turn. I have attached a video on testing with the # PTW2993 for you.
If the factory wiring connector tests correctly for all of the functions, it is likely that the trailer connector will need replaced. If the wires on the 4-Pole connector are pinched or damaged, this could be causing a short in the connector. If you need a new 4-Pole connector, I recommend the Curt # C55246 for your 2002 Sequoia.
If the pins on the factory wiring do not test correctly for their functions, and you want to continue using the factory wiring, you will want to take your Sequoia to your local Toyota dealer for them to inspect the factory wiring on your vehicle. Otherwise, you could use a trailer wiring harness that will hardwire install for your vehicle, like the Upgraded Heavy-Duty Modulite Circuit Protected Vehicle Wiring Harness with Installation Kit # C59496.
Product Page this Question was Asked From
Curt T-Connector Vehicle Wiring Harness for Factory Tow Package - 4-Pole Flat Trailer Connector
- Custom Fit Vehicle Wiring
- Trailer Hitch Wiring
- Vehicle End Connector
- No Converter
- Factory Tow Package
- 4 Flat
- Plug and Lead
- Plug-In
- CURT
more information >
Featured Help Information
Instructions
Miscellaneous Media
Continue Researching
- Shop: Trailer Wiring
- Video: Mount: Curt T-Connector Vehicle Wiring Harness for Factory Tow Package on a 2001 Toyota Sequoia
- Shop: Curt T-Connector Vehicle Wiring Harness for Factory Tow Package - 4-Pole Flat Trailer Connector
- Q&A: Trailer Wiring Harness for a 2002 Toyota Sequoia without Factory Tow Package
- Q&A: 5-Pole Flat Trailer Connector for 2001 Toyota Sequoia
- Search Results: trailer hitch
- Article: Trailer Wiring Diagrams
- Video: How to Choose a Trailer Brake Controller
- Q&A: What is the Difference Between a Class II and a Class III Hitch?
- Shop: Curt Powered Tail Light Converter with 4-Pole Flat Trailer Connector
- Shop: Trailer Hitch
- Search Results: trailer wiring
- Shop: Universal Installation Kit for Trailer Brake Controller - 7-Way RV and 4-Way Flat - 10 Gauge Wires
- Video: Firestone Ride-Rite Air Bags with Easy Mount Compressor Feature Breakdown
- Article: Brake Controller 7- and 4-Way Installation Kit (ETBC7)
- Q&A: What is the Difference Between a 4-Way and 7-Way Trailer Connector
- Search Results: trailer tires and wheels
- Article: How to Measure for Trailer Hitch Drop
- Q&A: Lug Nut Torque Chart for Trailer Wheels
- Shop: etrailer Anti-Rattle Hitch Collar for 2" Hitch Receivers
- Video: Curt T-Connector Vehicle Wiring Harness Review C56040
- Search Results: trailer jack
- Shop: Curt T-Connector Vehicle Wiring Harness with 4-Pole Flat Trailer Connector
- Shop: Brake Controller
- Article: Wiring Trailer Lights with a 7-Way Plug (It's Easier Than You Think)
- Q&A: Installation Time for Blue Ox BX1128 Flat Tow Base Plate Kit for 2016 Jeep Grand Cherokee
- Article: How to Choose the Right Trailer Hitch Class
- Video: The Low-Down on the Curt Powered Tail Light Converter with 4-Pole Flat Trailer Connector
- Shop: Redarc Tow-Pro Liberty Brake Controller w/ Universal Wiring Harness - Dash Knob - Proportional
- Search Results: trailer hitch ball mount
on Custom Fit Vehicle Wiring
