Troubleshooting Curt T-Connector Blowing Fuse on 2010 Toyota Rav4
Question:
I purchased and installed a trailer wiring harness on my 2010 Toyota Rav that I purchased. I followed the video for the installation. Originally the fuse at the battery terminal would blow after a short time and now blows as soon as I it in the fuse holder. HELP! Thanks
asked by: Ron T
Expert Reply:
Is this occurring with the trailer plugged in or was it unplugged?
If it's happening with the trailer plugged in, the likely cause is a short in the trailer wiring. You'll want to examine the running light circuit, which is usually a brown wire, the right turn/brake which is usually a green wire and the left turn/brake which is usually a yellow wire. Begin at the trailer connector, and trace your way back to the lamps, looking for pinched wires, loose connections, and nicked, worn or cracked wire insulation that would allow the copper wire to come into contact with the trailer frame and create a short circuit that would blow the fuse you mentioned. Once the short is found, repair it and you should be good to go.
If it's not happening with a trailer plugged in, carefully examine the plugs where the converter taps into the vehicle wiring. Look for bent pins, and once again check for nicked, cracked or worn insulation. I'll link you to an FAQ article that has further information about troubleshooting your trailer wiring. I'll link you to some videos that will also illustrate how to locate and repair a wiring short.
Product Page this Question was Asked From
Curt T-Connector Vehicle Wiring Harness with 4-Pole Flat Trailer Connector
- Custom Fit Vehicle Wiring
- Trailer Hitch Wiring
- Powered Converter
- Custom Fit
- 4 Flat
- CURT
more information >
Featured Help Information
Instructions
Miscellaneous Media
Continue Researching
- Video: etrailer Seat Covers Review - 2020 Toyota RAV4
- Article: My Trailer Hitch Doesn't Fit
- Article: Troubleshooting 4 and 5-Way Wiring Installations
- Shop: Trailer Wiring
- Shop: Trailer Hitch
- Shop: etrailer Bucket Seat Protector for Active Lifestyle - Waterproof - Easy On/Off
- Shop: etrailer Trailer Hitch Receiver - Custom Fit - Matte Black Finish - Class III - 2"
- Shop: Curt T-Connector Vehicle Wiring Harness with 4-Pole Flat Trailer Connector
- Shop: Brophy Camper Scissor Steps - 2 Steps - Steel - Diamond Tread - 17" Wide - 275 lbs
- Shop: TorkLift GlowStep Camper Scissor Steps - 2 Steps - Aluminum - 20" Wide - 375 lbs
- Shop: Brophy Camper Scissor Steps - 2 Steps - Aluminum - Diamond Tread - 17" Wide - 250 lbs
- Shop: Carr Mega Step Fold-Up Step - 2" Hitch - 14" Long - 500 lbs - Black
- Video: Choosing the Right Trailer Wiring
- Article: How to Choose the Right Trailer Hitch Class
- Search Results: trailer hitch
- Q&A: What is the Difference Between a Class II and a Class III Hitch?
- Q&A: What is the Difference Between a 4-Way and 7-Way Trailer Connector
- Search Results: hitch
- Article: Brake Controller 7- and 4-Way Installation Kit (ETBC7)
- Search Results: trailer hitch wiring
- Q&A: What Hitch Do You Recommend for a 2024 Toyota RAV4?
- Shop: Roof Rack
- Video: etrailer Class III Trailer Hitch Installation - 2023 Toyota RAV4
- Search Results: hitch bike racks
- Article: Trailer Wiring Diagrams
- Shop: Brake Controller
- Q&A: Difference Between Curt & etrailer Trailer Hitches For 2024 Subaru Crosstrek Wilderness
- Video: Curt Trailer Hitch Installation - 2023 Toyota RAV4
- Article: How to Measure for Trailer Hitch Drop
- Shop: Suspension Enhancement
on Custom Fit Vehicle Wiring
Gerard E.
7/7/2020
I have a 2012 Toyota corolla and a curt wiring harness when i plug into my trailer signal lights work perfect brake lights work perfect but as soon as I turn in the parking lights it blows the fuse in the car. can you please give me some advice thank you