How To Test the Redarc Tow-Pro Liberty w/out a Trailer

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Question:

Hello.. I have just today managed to fit the RedArc brake kit to my 2024 Subaru OBW. seems to work and lights up the dial blue and green etc..BUT..how can I tell if it is actually operating my Camper Trailer brakes..? What test can I do to be sure..? Thanks

asked by: Derek A

0

Expert Reply:

Hey Derek welcome back! The only way too test the Redarc Tow-Pro Liberty Brake Controller item # RED52VR, without driving your trailer around, is to use the manual override and a multimeter like item # PT89ZR.

You will want to adjust the power to the maximum setting of 10 on the Tow-Pro item # RED52VR. Then you'll use your multimeter to test for voltage at the brake output on your Subaru's 7-Way connector. Someone will have to sit in your Outback and apply the manual override on full while you are testing. You should be getting 11-12 volts if you've got it installed correctly.

If you have any additional questions, go ahead and throw them into the comment box below and I'll be happy to help you.

expert reply by: Jerred H

0

Derek

3/9/2025

Thanks Jerred.. I will give it a try and see what happens.. Derek.

Jerred H.

3/11/2025

@Derek Sounds good! You're welcome! Happy to help!

Answer 1

If you are looking for a way to power the trailer brakes you would not run the blue wire of the 7-way to the positive post of your battery. Instead you would run that wire up to the blue wire of a brake controller like the part #90885 that you…

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Answer 2

Honestly, Joah, if I were you I would try to find a shop in your area that has a heavy-duty torque wrench and breaker bar. 450 ft/lbs is quite a bit and most typical torque wrenches don't got that high. Sometimes if you can find a shop that has…

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Answer 3

Hey M, thanks for reaching out! Since you aren't seeing wires like what we show in the Redarc Tow-Pro Elite Brake Controller #RED44FR install video on a 2019 Ford Ranger, are you seeing a plug anywhere? The wiring is tucked up pretty far into the…

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Answer 4

Hello John, thanks for reaching out. Does your 2025 4Runner already have a 7-way plug installed on the back? If no, you will need the #ETBC7 kit in order to use a brake controller. If you already have a 7-way you should already be prepped for a brake…

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Answer 5

We have not yet (as of April 2019) had a chance to install any wired trailer brake controllers on a 2019 Ford Ranger so for guidance I checked with my most trusted brake controller expert at Tekonsha. Based on what I could learn about the truck if…

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Answer 6

I looked up the online owners manual for a 2019 Ford Ranger. This shows the fuse for the trailer module is in spot 73 and it will be a 30 amp fuse. These newer ford trucks have a smart tow feature. So the12v power at the 7 way will only be turned on…

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Answer 7

All the brake controller needs to sense a trailer connection so that you can test it is a slight amperage draw on the output circuit. For that you can use a circuit tester like the part #PTW2993 with one pin grounded and the other on the output pin.…

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Answer 8

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 9

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 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

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 12

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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How To Test the Redarc Tow-Pro Liberty w/out a Trailer

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