Trailer Right/Left Blinker Come On Together and Right Side has Constant Power in Trailer Connector
Question:
when i signal left why does right and left signal light go on on the trailer 05 gmc sierra. also i tested the wires and there is constant power on the right wireharness
asked by: Abe K
Expert Reply:
It sounds like there is a combination of issues that are causing the problems you are experiencing. Regarding both blinkers going off together when you engage the left blinker, this could be a bad ground. Bad ground connections can cause all sorts of weird problems.
Make sure that the truck side and trailer side connectors are properly grounded to clean and corrosion free bare metal surfaces. The truck ground is probably tied into the harness that leads to the connector so no worries if you cannot get to it. You will also need to make sure that the grounds for each of the lights are attached to clean and corrosion free bare metal surfaces.
The constant power draw can also be adding to the problem. The most likely cause is corrosion in the trailer connectors. Clean the pins on the truck and trailer connector but also check where the wires attach inside the connectors and clean there too. Corrosion in the connectors can cause a short leading to power draw on a pin that is not supposed to be drawing power.
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
- No Converter
- Custom Fit
- 4 Flat
- CURT
more information >
Featured Help Information
Instructions
Miscellaneous Media
Continue Researching
- Shop: Trailer Wiring
- Shop: Trailer Hitch
- Search Results: spare wheel bracket
- Search Results: 13 inch 5 lug
- Shop: etrailer Trailer Hitch Receiver - Custom Fit - Matte Black Finish - Class III - 2"
- Shop: Draw-Tite Max-Frame Trailer Hitch Receiver - Custom Fit - Class III - 2"
- Shop: T-One Vehicle Wiring Harness with 4-Pole Flat Trailer Connector
- Shop: CE Smith Spare Tire Mount for Trailers - Steel - 4- and 5-Lug Wheels - 8-3/8" Long
- Shop: CE Smith Spare Tire Mount - Locking - Steel - 4-Lug and 5-Lug Wheels - 8-3/4"
- Shop: Fulton Economy Spare Tire Mount - Lockable
- Shop: Karrier ST175/80R13 Radial Trailer Tire with 13" Galvanized Wheel - 5 on 4-1/2 - Load Range D
- Q&A: Troubleshooting No Power On Curt 4-Way Wiring Harness
- Q&A: Working Running Lights, But No Turn Signals or Brake Lights On Trailer
- Video: Curt Powered Tail Light Converter Installation - 2017 BMW X3
- Video: Curt Circuit Protected Tail Light Converter Kit Installation - 2018 Ford EcoSport
- Q&A: Is 3/4 Inch Plywood Floor Adequate for D-Ring Tie Down Anchors with Backing Plate for 3,000 lb Car
- Video: etrailer Trailer Hitch Installation - 2021 Mazda CX-5
- Q&A: How do I Diagnose My Left Turn Signal Not Working on My Trailer?
- Q&A: Trailer Turn Signals Both Blink at the Same Time When Right or Left Turn Signal is Turned On
- Q&A: Which Pin On A 7-Way Should Have Constant 12V Power When Vehicle Is Running
- Q&A: How to Activate Trailer Lights on 2014 Jeep Grand Cherokee Laredo with C55515 Wiring Harness
- Search Results: 90160
- Video: Choosing the Right Trailer Wiring
- Article: How to Choose the Right Trailer Hitch Class
- Search Results: hitch
- Article: Brake Controller 7- and 4-Way Installation Kit (ETBC7)
- Video: Choosing the Right Brake Controller
- Shop: Brake Controller
- Article: Trailer Wiring Diagrams
- Search Results: 25580
on Custom Fit Vehicle Wiring
