Troubleshooting Trailer Tail Lights and Turn Signals Malfunctioning When Running Lights Are On
Question:
Hello, My turn signal and brake lights operate normally or as they should when the running lights are off indicating correct wiring between trailer and truck. But when the running lights are turned on, which all lights on the trailer turn on indicating correct wiring between trailer and truck the brake lights and turn signal no longer operate and the tail lights just stay on solid. Any suggestions as to where to look?
asked by: Terry
Helpful Expert Reply:
I would be happy to help!
Since you are only having issues when multiple functions are trying to work at the same time it is more than likely a ground issue.
I recommend checking the main ground on the tongue of the trailer making sure it is secured to clean rust free metal. If your trailer is a tilt bed or aluminum make sure the grounds from each lights are run to the main ground.
Grounding issues usually cause issues when multiple functions are drawing power at the same time, and can cause all sorts of confusing issues.
I included a link to a helpful article on wiring for you to take a look at.
Product Page this Question was Asked From
RV Tail Light - Stop, Tail, Turn - Rectangle - Red Lens - Passenger Side - Black Base
- Trailer Lights
- Tail Lights
- Rear Reflector
- Stop/Turn/Tail
- Rectangle
- Surface Mount
- Non-Submersible Lights
- Incandescent Light
- 8-5/8L x 3-3/16W Inch
- Red
- Optronics
more information >
Featured Help Information
Miscellaneous Media
Continue Researching
- Shop: RV Tail Light - Stop, Tail, Turn - Rectangle - Red Lens - Passenger Side - Black Base
- Article: Trailer Wiring Diagrams
- Q&A: Can the Optronics Passenger Side Trailer Light Be Used on the Drivers Side
- Q&A: Can a Passenger Side Tail Light Be Used on the Driver Side of a Trailer
- Shop: Incandescent RV Tail Light - Stop, Tail, Turn - Rectangle - Red Lens - Passenger's Side
- Video: Review of Deka Wiring Parts - 22-18 Gauge Butt Connectors - 05730-5
- Shop: 22-18 Gauge Butt Connectors - 5 Pack
- Search Results: 25580
- Video: Choosing the Right Trailer Wiring
- Shop: Trailer Wiring
- Shop: Optronics LED Trailer Tail Light - Stop, Tail, Turn - Submersible - 10 Diodes - Red Lens
- Q&A: What is the Difference Between a 4-Way and 7-Way Trailer Connector
- Q&A: What is the Difference Between a Class II and a Class III Hitch?
- Shop: Optronics LED Trailer Tail Light - Stop, Turn, Tail - Submersible - 10 Diode - Oval - Red Lens
- Shop: Trailer Hitch
- Video: Choosing the Right Brake Controller
- Article: Brake Controller 7- and 4-Way Installation Kit (ETBC7)
- Search Results: trailer lights
- Search Results: junction box
- Shop: Universal Installation Kit for Trailer Brake Controller - 7-Way RV and 4-Way Flat - 10 Gauge Wires
- Q&A: Replacement Clearance Lights Needed for GLO-BRITE 122R and 122Y Lights
- Shop: Brake Controller
- Q&A: Trailer Running Lights Do Not Work but Brake Lights and Turn Signals Do Work
- Article: How to Choose the Right Trailer Hitch Class
- Search Results: wire
- Video: Optronics GloLight Trailer Lights Manufacturer Review
- Shop: Optronics LED Clearance or Side Marker Light - Submersible - 3 Diodes - Rectangle - Amber Lens
- Video: Timbren Axle-Less Trailer Suspension System Installation
- Shop: Suspension Enhancement
- Search Results: fender
on Trailer Lights
