Trailer Lights Not Working After Launching Boat Trailer Into Water
Updated 07/27/2017 | Published 07/25/2017
Products Featured in This Question
Question:
I had the entire lights redone on my trailer. They worked well one time. I took it to the lake and pulled back to far and got water on the connection. After that my running lights work but my blinkers and brake lights do not work. Any ideas on what is wrong?
asked by: Josue P
Expert Reply:
It sounds to me like you may have shorted out a wire somewhere along on the trailer's wiring harness. To test this, I recommend using a circuit tester like part # PTW2993. Have a friend sit in the vehicle and apply the brakes and turn signals while you test the wires just before the taillights. If power is reaching the taillight but still not working, you will first want to ensure the connections at the back of the taillights are secure and corrosion free. If no problems are present, you may want to replace your taillights with a pair of submersible lights like the LED Trailer Light Kit part # TLL160RK.
If power is not reaching the taillight, you will first want to begin visually inspecting the wires from the back of the taillight housing all the way to the trailer connector plug. You can use the circuit tester while testing intermittent points on the wires to give you a better idea where the short is located. If worse comes to worst, you will want to run new wires to each taillight using the 7-Way Molded Trailer Wire Connector part # H20046 for 7-way trailer connectors and the Wesbar 4-Pole Flat Connector w/ Jacketed Cable part # W787274 for 4-way trailer connectors.
I have attached an installation video of both wiring harnesses for you.
Product Page this Question was Asked From
Featured Help Information
Miscellaneous Media
Continue Researching
- Shop: ONE LED Trailer Tail Light - 5 Function - Submersible - 3 Diodes - Red Lens - Passenger Side
- Q&A: Boat Trailer Tail Lights Stopped Working After Backing Trailer in Water
- Shop: LED Combination Tail Light Kit for Trailers under 80" Wide - Submersible - Driver and Passenger
- Article: Trailer Lighting Requirements
- Video: Comprehensive Review: V-Shaped Identification Light Bar for Boat Trailers
- Video: Let’s Check Out the Comfort Ride Transom Saver
- Article: Trailer Wiring Diagrams
- Q&A: Trailer Brake Lights Work But Turn Signals Do Not Work
- Shop: BoatBuckle Kwik-Lok Transom Tie-Down Straps - Stainless Steel - 2" x 2' - 333 lbs - Qty 2
- Shop: BoatBuckle Heavy Duty Ratchet Transom Tie-Down Straps - 2" x 4' - 833 lbs - Qty 2
- Shop: Optronics LED Clearance or Side Marker Light w/ Reflex Reflector - 6 Diodes - Square - Amber Lens
- Shop: Low Profile LED Trailer Combination Tail Light - Submersible - 8 Function - Driver Side
- Shop: LED Trailer Combination Tail Light - Submersible - 6 Function - 7 Diodes - Red Lens - Passenger Side
- Search Results: stl0066rbg
- Search Results: trailstar
- Search Results: optronics s2t216ap2
- Q&A: Need Suggestion on Fenders That Fit 12" Wheels?
- Video: Trailer Wiring Junction Box Review
- Video: Feature Breakdown: Mounting Brackets for Trailer Fender
- Video: Redline Trailer Fenders PF775-BKT-2 Review
- Video: Review of Redline Galvanized Steel UShaped BoltOn Brackets Plastic Single Axle Fender - PF1135-BKT-2
- Video: Breaking Down the Single Axle Trailer Fender w/ Backing Plate
- Q&A: Trailer Running Lights Do Not Work but Brake Lights and Turn Signals Do Work
- Q&A: How to Test Brake Controller without Trailer Connected
- Article: Wiring Trailer Lights with a 7-Way Plug (It's Easier Than You Think)
- Q&A: Recommended Warm White 4-1/4" Diameter Puck Light
- Q&A: Trailers Right Tail Light Stays on Even While Unplugged
- Article: Brake Controller Installation: Starting from Scratch
- Article: Troubleshooting 4 and 5-Way Wiring Installations
- Article: Brake Controller 7- and 4-Way Installation Kit (ETBC7)
on Automotive Tools
