What Does Blue LED Mean For Redarc Tow Pro Liberty Brake Controller?

Question

Question:

I just installed the Liberty version on my 2016 Ram 1500. I do not yet have the trailer I want to be towing. I can see a very very faint blue light from the LED when I have it removed from its housing. Is there any way to know if its working correctly if I dont have a trailer to hook up to?

asked by: Rob G

0

Expert Reply:

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 have no reason to assume the controller is not working correctly since problems with the factory connections are very rare. Still, the best way to confirm this is by hooking up the trailer and checking.

expert reply by: Jesse M

0

Jesse M.

12/1/2025

Hey Rob, how did things go once you were able to hook up your trailer and test the Redarc Liberty controller? Your update could make it easier for the next person checking their setup without a trailer connected.

Rob G.

12/2/2025

@JesseM Thank you so much for resolving the issue with the part that was missing the plastic light tube. I am very happy with the all the people who helped me with this at Etrailer. I have even told people about how good the service was. Once I got it hooked up to the trailer it worked very well and the appearance of the control knob on the truck's console looks very professional. Thank you again and have a great weekend! Rob

Jesse M.

12/3/2025

@RobG Hey Rob, thanks for your kind words! I'm glad we were able to sort things out! This is the first I have heard of this specific problem with the LED itself being missing, so I will definitely be keeping an eye out for this in the future. If you ever need anything else, anything at all, don't hesitate to reach out!

Answer 1

Hey Andy, thanks for reaching out and also for your recent purchase! If there is already another harness with relays plugged into the spot that the harness from the T-One Vehicle Wiring Harness #118266 should plug into on your 2023 Nissan Frontier,…

view full answer...

Answer 2

Are there still open spots on the fuse panel? A lot of times there will be 1 brown relay that activates the 12v power for the trailer connector, and there will be 2 blue relays which are for the turn signals. So even though there are already 3…

view full answer...

Answer 3

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.

view full answer...

Answer 4

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.…

view full answer...

Answer 5

A weight distribution system with a tongue weight range of 800-1,200 lbs (I am assuming that's what you meant) is going to be very harsh on a trailer that only has 300 lbs of tongue weight. You will need a much lighter rated system. Ideally you…

view full answer...

Answer 6

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…

view full answer...

Answer 7

I reached out to my contact at Redarc regarding the dim LED you're getting on the knob of the Tow-Pro Elite Trailer Brake Controller #RED44FR. He said that inside the knob/remote there is a 90 degree light pipe which is what brings the light up…

view full answer...

Answer 8

The controller will actually wake up from sleep mode when the door is opened so that's likely why you still see the blue light on even with the vehicle off and trailer unconnected. This is common for all brake controllers including the Redarc…

view full answer...

Answer 9

It is very normal for a brake controller like the Tekonsha Prodigy P2 Trailer Brake Controller - 1 to 4 Axles - Proportional #90885 to have a small time period where it still appears active after a vehicle is turned off. It normally will go into a…

view full answer...

Answer 10

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…

view full answer...

Answer 11

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…

view full answer...

Answer 12

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.

view full answer...

What Does Blue LED Mean For Redarc Tow Pro Liberty Brake Controller?

Product Page this Question was Asked From

Featured Help Information

Instructions

Continue Researching