Troubleshooting Curt Brake Controller Not Working With Headlights On

Question

Question:

I recently purchased a Wolf pup trailer. I am pulling it with a 2002 Toyota tundra. I noticed that when I turn on my lights my Curt brake control dose not sent the power to the breaks to activate. It will only work if i have the lights off. Any ideas on what could do to fix it?

asked by: Oscar M

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Expert Reply:

If your Curt brake controller connects to your 2002 Toyota Tundra via the vehicle port under you dash, like what we see with the Assure Controller # C49UR and Wiring Adapter # C51515, then there really shouldn't be any reason why your headlights being on should change anything.

I recommend using a circuit tester like part # PTW2979 to check all of the wires going to your brake controller as well as all of the wires going into the 7-Way at the back of your truck since it sounds like you have some wire functions crossing somewhere.

Attached are some helpful articles for you to check out as well.

expert reply by: Jon G

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Answer 1

Since you've already ran the wires for your Curt Discovery Brake Controller #C84VV, installing a Tekonsha Prodigy P2 Trailer Brake Controller #90885 will be easy, however the #C51515 wiring adapter that plugs into the Curt brake controller is not…

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Answer 2

The difference between the Class II and Class III hitches has to do with their Gross Trailer Weight (GTW), their Tongue Weight (TW), and their Hitch Receiver Size. Class II trailer hitch receivers have a 1-1/4 inch receiver and can be rated up to…

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Answer 3

In order to determine the torque rating for the lug nuts on your trailer you will need to know check out the chart I attached that shows all of the torque specs for all the trailer lugs available based on stud size, wheel material and wheel size.

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Answer 4

A 4-Way trailer connector has the basic lighting functions only; running lights, left turn signal and brake lights, right turn signal and brake lights, and ground. A 7-Way has these functions and a 12 volt circuit, a circuit for electric trailer…

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Answer 5

To install a Redarc Tow Pro Liberty in your 2023 Toyota Tacoma Sport you will need the following parts: Redarc Tow-Pro Liberty Brake Controller item #RED24FR Plug-and-Play Wiring Harness for Redarc Tow-Pro Trailer Brake Controllers item #RED99FR…

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Answer 6

That's a very good question, we tend to be extra cautious and say to use 10 gauge wire because that would be more than enough. When you get into longer trailers that will end up using a lot of wire the heavier gauge wire becomes more necessary.…

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Answer 7

Sure, I can help with that. I can see why the fitment notes are confusing. For a 2012 Toyota Tundra with the factory tow package and factory 7 way connector, you'll want a brake controller that plugs into the factory brake controller port under…

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Answer 8

Hey Dale, thanks for reaching out. For your 2010 Toyota Tundra with the factory tow package, a proportional controller is definitely the way to go for smooth braking on a 2-axle trailer, and a really clean option is the Redarc Tow-Pro Liberty…

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Answer 9

Hey Connor, since your 2007 Toyota Tundra comes with a factory 7-way the correct kit to install the Redarc Tow Pro Liberty would be the part #RED82CR which comes with the correct harness that plugs in under the dash of your truck. What are you…

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Troubleshooting Curt Brake Controller Not Working With Headlights On

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