Constant Power on Blue Brake Controller Wire Using Tekonsha Voyager Brake Controller
Question:
fitted unit and have power to the trailer plug [blue wire] all the time. also no led light working
asked by: Mike B
Expert Reply:
It sounds like there is a short to the blue brake output wire somewhere between the controller and the trailer connector on your vehicle. There are some things you can do to test to determine where the problem is.
Brake controllers do send back a minimum amount of voltage to check for a connected trailer, but it should not be enough to activate the brakes.
The magnets humming makes me think there is a bit of a short. To determine where it is coming from the first step is to disconnect the trailer.
In the truck cab you will need to sever the blue wire several inches from the back of the controller. Then use a circuit tester such as # PTW2992 to test the end of the blue wire coming out of the controller. It should only have power when you apply the manual override or brake pedal. If it shows power at idle, then there is something wrong with the controller and it will need to be replaced.
If it tests fine, then reconnect the blue wire. Then move on to the truck side trailer connector. Many times, dirt or corrosion can cause a short in a trailer connector. Make sure the truck and the trailer side connectors are clean and free of corrosion inside and out.
You can test the brake output pin and it should only show power with the manual override. If it shows power any other time, then there is a short somewhere between the connector and the brake controller you will need to track down.
I have also included some help articles on testing and troubleshooting brake controllers for you.
Products Referenced in This Question
Product Page this Question was Asked From
Tekonsha Voyager Trailer Brake Controller - 1 to 4 Axles - Proportional
- Trailer Brake Controller
- Proportional Controller
- Electric
- Manual Leveling
- Under-Dash Box
- Dash Mount
- Up to 4 Axles
- Indicator Lights
- Up to 90 Degrees
- Tekonsha
more information >
Featured Help Information
Instructions
Miscellaneous Media
Continue Researching
- Shop: Brake Controller
- Shop: Trailer Wiring
- Article: Troubleshooting Brake Controller Installations
- Q&A: Should a Brake Controller Blue Wire have Voltage All the Time
- Article: Brake Controller Installation: Starting from Scratch
- Article: Testing Brake Controls
- Q&A: Troubleshooting a Tekonsha P3 Brake Controller With Trailer Brakes That are not Showing Power
- Q&A: Troubleshooting No Power on the Blue Brake Output Wire from a Brake Controller
- Q&A: Trailer Brakes Actuate Immediately When Trailer is Plugged in to Vehicle
- Q&A: Electric Trailer Brakes Lock Up When Trailer is Plugged in to Tow Vehicle
- Video: etrailer Trailer Brake Controller Universal Installation Kit Installation - 2018 Chevrolet Express V
- Q&A: Should Blue Wire on Trailer Have Power
- Search Results: brake controller wiring
- Search Results: etbc7 kit
- Shop: Curt Discovery NEXT Trailer Brake Controller - 1 to 4 Axles - Time Delayed
- Shop: Hook Probe Circuit Tester
- Shop: Tekonsha OEM Replacement Vehicle Wiring Harness w Brake Controller Adapter - 7 Way Trailer Connector
- Shop: Pigtail Wiring Harness for Tekonsha and Draw-Tite Brake Controllers - 34" Long
- Shop: Universal Installation Kit for Trailer Brake Controller - 7-Way RV and 4-Way Flat - 10 Gauge Wires
- Shop: Tekonsha BRAKE-EVN Trailer Brake Controller - 1 to 4 Axles - Proportional
- Shop: Tekonsha Prodigy P2 Trailer Brake Controller - 1 to 4 Axles - Proportional
- Article: Trailer Wiring Diagrams
- Q&A: Troubleshooting Error Codes SH and OL on a Tekonsha Prodigy Brake Controller
- Search Results: 44649
- Article: Brake Controller 7- and 4-Way Installation Kit (ETBC7)
- Shop: Trailer Hitch
- Video: Choosing the Right Trailer Wiring
- Search Results: 68149
- Video: Choosing the Right Brake Controller
- Video: Lippert Solera Slider Slide-Topper Review