Troubleshooting Trailer Brake Controller Brake Power at 7-Way Without Trailer Connected

Question

Question:

2007 silverado hd old body , wire harness for trailer ,should there be power to the plug for brakes if trailer is not hooked up? test light shows just a blink does trailer have to be hooked up so truck register hooked fo full power for brakes to work?

asked by: GARRY B

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Expert Reply:

When you don't have a trailer hooked up to your 2007 Silverado, the 5 o'clock pin where the brake controller output is, should not have any power until you put a draw on that wire with your test light like circuit tester # PTW2993. As soon as a draw is placed on that pin, there should be a dim light that should increase in intensity as you hit the manual override slide on your controller. A proportional brake controller will not show braking because you are not moving except with the manual override slide.

The small power draw when you connect the tester should cause your controller to register that a trailer is connected. The blinking light may be the signal the controller sends back every so often to see if a trailer is connected.

expert reply by: Jason S

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Answer 1

It should be getting close to 12 volts if the power output is set to the maximum on the brake controller. Some brake controllers will not work properly if they are titled or turned to the side or if it has a leveler knob that is not level. Check…

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Answer 2

Yes. The Tekonsha 7-Way, RV-Style Tester for Brake Controllers - LED Test Lights #6562 will plug into a 7 way trailer plug on your 2015 Toyota Highlander and allow you to test the function of a Redarc Tow Pro Liberty #RED24FR without any issues.

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Answer 3

There are a number of reasons why the brakes on your trailer may not be working. Lets start with the easiest things to check. First, check the vehicle and trailer connectors for corrosion. This can cause a short inside the connector and the brake…

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Answer 4

If you aren't receiving any power at the 12V pin location on your truck's 7-Way connector, I recommend making sure that there is not a blown or missing fuse. I took a look at the online owner's manual for your 2017 Ford F-350 for the…

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Answer 5

Since the trailer is brand new most likely the issue is that the brake assemblies aren't adjusted properly as this is the most common cause for weak brakes on a new trailer. If the assemblies are self-adjusting they will get tighter with every…

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Answer 6

There are a few tests you can do first before you go replacing your Tekonsha Voyager XP. In your truck cab sever the blue wire several inches from back of the brake controller, and use a circuit tester #PTW2993 to check for power on the back of the…

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Answer 7

After taking a look in the owner's manual for the 2014 Ford F-350 the trailer brake fuse is located in the power distribution box in the engine compartment. The fuse location is 22 and it is a 30 amp fuse. You may want to match this information…

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Answer 8

To determine why you do not have any power on the blue brake output wire, I recommend starting at your brake controller. First, make sure the brake controller is on and receiving power. Most brake controllers have 4 wires, blue (brake output to…

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Answer 9

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 10

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 11

Hey Jeremy, Typically with boat trailers the manufacturer will install hydraulic surge brakes because you don't have to worry about the water damaging wires like you would with electric brakes. That being said, if you use a heat shrink butt…

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Answer 12

You are correct, you should only be getting output when the brake is applied, or the override switch is activated. It sounds like the controller might be bad, but to make sure, you should probably bench test it before tossing it. Use a circuit…

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Troubleshooting Trailer Brake Controller Brake Power at 7-Way Without Trailer Connected

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