Troubleshooting Redarc Tow Pro Elite That No Lights Come On

Question

Question:

My controller light isnt coming on. Not recognizing trier plug in. Havent had this problem before. How can I troubleshoot this?

asked by: Joe A

0

Expert Reply:

Since the Redarc Tow-Pro Elite Trailer Brake Controller - 1 to 3 Axles - Proportional # RED44FR you have does not have any lights you are correct that it is not recognizing that a trailer is connected.

What you will need to do is inspect the 7-way connector on your tow vehicle and trailer looking for any corrosion or debris in the connectors that can cause a connection issue.

If the connectors look good double check the wiring on the vehicle and trailer side to verify that no wires have come loose, or have damage causing a connection issue.

I included a video of the # RED44FR for you to take a look at.

expert reply by: Samuel C

0

Nathan R.

3/18/2024

Everything looks good, wires are essentially new. No problems with wiring, all the other lights work on my tester except the “brake” and the controller knob doesn’t light up. Is there anything I should be looking at? I installed this unit about a year ago but have never used it, I’m planning a camping trip and thought I should check it and of course now it doesn’t light up. -Nate

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Mike L.

3/19/2024

@NathanR What's the year/make/model of your vehicle?

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Nate

3/19/2024

Hi @MikeL ! it's a 2021 Wrangler JLU diesel.

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Mike L.

4/6/2024

@Nate Can you tell me which tester you're using? Is there a friend or neighbor who has a trailer with brakes you can test the controller with? Have you tried using the manual brake button? The controller won's show a connection unless there is a proper voltage draw on the trailer connector, and it won't output voltage unless the vehicle is in motion or the manual brake button is pressed...

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See All (10) Replies to Nathan R. ∨

Brooke K.

7/9/2025

I had the same problem. I hadn’t towed for about 8 months. The LEDs would not light. After checking the connectors and wiring I unplugged the brake controller from the vehicle for a few seconds and plugged it back in. It’s working normally now.

Reply

Jameson C.

7/9/2025

@BrookeK Glad you got it to work!

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Answer 1

In regards to the Redarc Tow-Pro Liberty Brake Controller part ##RED24FR, the unit should not be illuminated while driving without a trailer. If you press the button while a trailer is not attached you should see a breathing blue light and that…

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Answer 2

I attached a picture that shows where we found the brake controller install connector on a 2016 Ram 1500 to install the P3 part #90195 and install harness part #3024-P. I also attached an install video that shows the entire process as well.

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Answer 3

The Replacement Standard Dual Rack Repair Kit for Lippert RV In-Wall Slide-Outs - Fixed Side, #LC84FR is the left side of the slide-out as looking at it, facing it, from the outside. The float side, #LC26VR, will of course be the right side as facing…

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Answer 4

Since everything else is working on your Redarc Tow-Pro Liberty Brake Controller #RED24FR there may be a problem with the light pipe on the control knob. there is a 90 degree light pipe which is what brings the light up and out through the button. If…

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Answer 5

The best way to test your Redarc Tow-Pro Elite #RED44FR or Liberty #RED52VR brake controller is by cutting the blue wire coming out of it about 6" away from the controller and using a circuit tester to make sure power is coming out of the…

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Answer 6

Hello Rob, thanks for reaching out. So it is normal for the Redarc Liberty controller to have a blue light when the trailer is not hooked up. This just means it isn't detecting trailer brakes. If you used a custom plug-and-play harness, I would…

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Answer 7

Hello John. The correct Redarc plug-and-play kit for your 2016 Ram 1500 is part #RED87CR. This comes with the Redarc Tow-Pro Liberty Brake Controller as well as the custom plug and play pigtail for your 2016 Ram.

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Answer 8

An electric trailer brake controller is a device that installs in the cab of your tow vehicle and activates your trailer's electric or electric-over-hydraulic brakes when you hit the brakes in your tow vehicle. It's not a binary activation.…

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Answer 9

Correct, the Redarc Tow-Pro Liberty Brake Controller #RED24FR will indeed still continue to calibrate without a trailer connected, but without the constant LED light. Per Redarc, if you just drive normally - even without a trailer connected - the…

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Answer 10

Even when stored in the somewhat controlled environment of a garage, tires are still subject to dry rot and flat spotting. Even if the tire tread has plenty of depth left and you can't see any cracking with the naked eye, the generally accepted…

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Answer 11

We haven't installed a brake controller using an adapter like the Tekonsha #3050-P on a 2021 Nissan Titan yet, but the plug you're looking for is typically located under/behind the driver's side dash panel to the left of the steering…

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Answer 12

In order to find out a jack for your Jayco, you're going to need to know what your trailer's tongue weight is and pick a jack that can support that weight rating. Since your Jayco has a GVWR of 3,950 lbs (and tongue weight is 10-15% of the…

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