Troubleshooting Ford F-350 Trailer Brake Controller Not Registering

Question

Question:

light of trailer work perfectly but controller not registering checked fuses all good dont know what to do

asked by: andrew b

0

Expert Reply:

I would start by using a circuit tester, item # PTW2993 if needed, to check the wiring going to and coming from the brake controller. There are 4 wires that will need to be checked.

White - Ground
Red - Stoplight Switch
Black - 12 Volt Constant Power
Blue - Brake Feed to Trailer Brakes

First, make sure the ground wire is attached to a clean, paint and rust-free chassis ground. Next, connect the circuit testers alligator clip to the ground and check the black 12-volt wire going into the brake controller. Next, check the red wire coming off of the stoplight switch which should have power only when the brake pedal is pressed. Finally test the blue, brake feed wire.

If you have power going into the controller on the 12-volt wire and the red stoplight wire, when the pedal is pressed, then you should get power out on the blue wire. You should also get power out on the brake feed wire when the manual brake lever is activated.

If the above connections are made properly and the controller is still not working, disconnect the blue brake feed wire near the back of the brake controller. Then check the blue brake feed wire for output. If the the controller functions normally when the brake is pressed, you have a problem on the brake circuit somewhere between the controller and the trailer brakes. If you still have a problem, then there is most likely something wrong inside the brake controller itself. Brake controllers have no internal user serviceable parts.

expert reply by: Robert G

0

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

You do have the correct electric brakes for your 2017 Winnebago Minnie 2500RL with the TruRyde Electric Trailer Brake Kit - Self-Adjusting - 10" - Left and Right Hand - 3,500 lbs #TRU36FR. The magnet would be an issue if you see their windings…

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Answer 3

If your OEM controller on your 2006 Ford F-350 is a proportional controller, like the Prodigy P2 #90885, then it will likely only send power back through the pedal when you are actually moving. The P2 has an internal inertia sensor so that it…

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Answer 4

There are many reasons why one of your hubs is running hotter than the other. We usually recommend that you work on both hubs at the same time when you are trouble shooting, this way you know that the same work was done on both hubs. I would change…

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Answer 5

I have a solution for you, but I don't recommend using white lithium grease on your wheel bearings, since it's more of a general lubricant and there are much better products specifically designed for wheel bearings. Instead, I recommend using…

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Answer 6

According to Lippert they use Lithium Complex grease on their 2k-7k axles. This means you can use a Lithium Complex grease like the LubriMatic LMX Industrial Strength Grease - 14 oz. Cartridge #L11390 for your bearings.

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Answer 7

Yes, you will want to add Grease #L11390 to your grease zerk after you repack your Bearings #BK3-300. This will ensure the the entire hub is full of grease. I recommend keeping a separate Grease Gun #L30416 with the trailer so you will be able to add…

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Answer 8

When adding grease like the #L11390 you want to pump the grease slowly and rotate the hub. You will continue to pump the grease until you begin to see grease come out of the front. If you're replacing old grease, you will continue to pump until…

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Answer 9

Standard tapered trailer wheel bearings are recommended to be re-packed with fresh bearing grease about every year or every 12,000 miles under normal use. In certain conditions this interval could be shorter, such as if you routinely tow the trailer…

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Answer 10

Typically as long as you're staying at or below 200 degrees you're doing fine. The fact that one hub is hotter than the other could just mean that you had more weight over that one hub or that the brake setting was more aggressive on that hub…

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Answer 11

If the controller is working fine with one trailer and not with the other then the problem is most likely with the trailer and not the truck. I would start by checking all of the ground connections on the trailer, especially the ground at the coupler…

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Answer 12

On many drum brakes there are wear indicators at the pad material on the shoes. If the pad material is riveted on and you have reached the rivets then it is time to replace them. If you have the brakes adjusted out all the way and the braking is…

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Troubleshooting Ford F-350 Trailer Brake Controller Not Registering

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