Troubleshooting Trailer Turn/Brake Signal Not Working on a 2014 Toyota Tundra
Question:
Hey guys, I have a 2014 Toyota Tundra with factory tow package, just the other day when I hooked up to my trailer my turn signal/ brake lights didn’t work on the trailer, but they work on the truck. I still have running lights and my electric brakes work on both my enclosed trailer and dump trailer through the 7 pin plug. I also tried my small utility trailer through the 4 pin plug and had the same problems. I have checked every fuse in the truck both in the engine bay and under the dash and all fuses are in working order. I also tried switching relays out to the trailer relay and that didn’t work either. I put a volt meter onto the 7 pin truck side connector and I have 12v running to my running lights, brakes, aux power. For some reason I only have 10.5v running to both the left stop/turn and right stop/turn pins and I cannot figure out why. I have also hooked all three trailers up to a friends truck and all lights work properly. Any help would be greatly appreciated. Thanks
asked by: Luke D
Expert Reply:
Thank you for all of the details, you have already done quite a bit of the work in narrowing down the problem. Since the common denominator in this situation is your 2014 Toyota Tundra the issue can be isolated to that.
You should be getting 12V of power to your stop/turn lights so since that is lower you most likely have a ground issue. Check the ground on your Tundra as well as the wiring for those light circuits. You should find a bad ground or some wiring that has been pinched or damaged.
If you make sure that your ground is securely connected to a clean, bare-metal surface and replace any damaged wiring with 16 gauge wire like part # 16-1-1 and butt connectors # DW05744-5 than your problem should go away.
Products Referenced in This Question
Deka Heat Shrink Butt Connector - 16-14 Gauge - Nylon Insulation - Blue - Qty 5
- Wiring
- Wire Connectors
- Butt Connectors
- 16-14 Gauge
- Deka
more information >
Product Page this Question was Asked From
Featured Help Information
Miscellaneous Media
Continue Researching
- Search Results: 25980ez
- Q&A: Surge Brake Actuator Recommendation to Replace TITAN / DICO Model 60Z
- Search Results: 25981ez
- Shop: Air Lift WirelessONE Suspension System for Air Helper Springs - Remote - Bluetooth - EZ Mount
- Shop: Dexter 2-Tang Clevis w/ 2-Position Adjustable Channel - 1" Pin Hole - 20K
- Shop: Replacement Adjustment Pin and Clip for Rapid Hitch AM3400 Series
- Search Results: 88255
- Search Results: 90160
- Video: Checking Out the Replacement Adjustment Pin and Clip for Rapid Hitch AM3400 Series
- Shop: Demco Hydraulic Brake Actuator - Drum - Zinc - 2" Ball - 7,000 lbs
- Shop: Flint Hill Goods 29" x 49" Carrier w/ 60" Ramp - 2" Hitch - 500 lbs
- Shop: Air Lift LoadLifter 5000 Air Helper Springs - Rear Axle
- Search Results: fender
- Q&A: Where Does 3rd Wire On 3-Wire Breakaway Switch Get Connected To?
- Search Results: actuator
- Q&A: Torque Specs for Install Bolts of Coupler Part # CTA-280
- Search Results: uo12~021
- Shop: MORryde Suspension Upgrade Kit for Tandem Axle Trailers - 2-1/4" Long Shackle Straps
- Video: Air Lift LoadLifter 5000 Ultimate Rear Air Helper Springs with Internal Jounce Bumpers Review
- 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
- Article: Trailer Wiring Diagrams
- Video: Choosing the Right Vehicle Suspension Upgrades
- Article: Choosing the Right Suspension Kit for Your Truck and Trailer
- Q&A: Comparing Air Springs And Jounce Springs For A 2022 Chevy Silverado DRW 4x4
- Q&A: Choosing Between Air Lift Load Lifter 5000 or 7500 For 2018 Ram 2500 Towing 5th Wheel
- Article: Brake Controller Installation: Starting from Scratch
- Video: Finding the Right Trailer Wiring Harness
- Q&A: What is the Difference Between a Class II and a Class III Hitch?
- Article: Wiring Trailer Lights with a 7-Way Plug (It's Easier Than You Think)
on Wiring
