Can Corrosion Cause Wiring Malfunctions

Question

Question:

I have a 2015 Dodge Grand Caravan that I have added a trailer hitch and custom wiring harness to. Recently I have had problems with the lights on the trailer. Initially the lights worked fine. Now the directionals and stop lights do not work. I have replaced the flat plugs on both the car and the trailer. I noticed the white wire and the green wire were corroded within the insulation. What could the cause be? Does this have anything to do with my problem?

asked by: Frank L

1

Helpful Expert Reply:

The first thing you will want to do is replace any corroded connectors or wires that you see as this will cause your lights to malfunction. Once the corrosion is gone, test the ends on each of the poles coming from the vehicle side trailer connector for proper function while a helper activates each circuit. You can do this by using a circuit tester part # PTW2993.

This should fix your problem however, if it does not, I would be glad to offer further troubleshooting advice if you can tell me what other issues you are experiencing.

expert reply by: Conner L

1

Answer 1

Like most other brake controllers do, the Draw-Tite Activator IV, part #5504 sends a small test pulse of voltage through the brake output circuit to confirm that the trailer is plugged in and that the brake magnets are receiving the signal. This…

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Answer 2

The easiest way to determine what could be causing the issue with your Redarc Tow-Pro Liberty Brake Controller #RED24FR, installed in your 2022 Toyota 4Runner using the Plug-and-Play Wiring Harness #RED49FR is to check the fault code chart in the…

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Answer 3

The blue light is normal, the light should fade from blue to red when the brakes are being activated so the purple sounds normal as well. The flashing red light is concerning. Red LEDs on the Redarc Tow-Pro Liberty #RED24FR can mean a few things. The…

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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 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 6

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 7

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 8

Hey Jonathon thank you so much for all of that additional information! To haul your bikes behind your class C Sprinter motorhome, while flat towing your Mini, I recommend the Hollywood Racks RV Rider Bike Rack item #HLY64FR and the Roadmaster Dual…

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Answer 9

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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Answer 10

The Redarc Tow-Pro Liberty #RED24FR is the way to go over the Elite #RED44FR as you get the nicer functions of the Elite at a lower price. The Elite has the ability to be the more preferred proportional style of controller as well as a time-delayed…

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Answer 11

If you just need a 4-pin to 7-pin trailer wiring adapter, then you can use part #C57672. This will plug into the 4-pin trailer connector on your brother's vehicle and give him the 7-pin socket for the trailer. Keep in mind, this will only give…

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Answer 12

Hey Scott! Your 2026 Ford Ranger may or may not have a brake controller port/plug, even with the tow package. There will be four wires coming out of a large wire harness by the driver side firewall, left of the brake pedal, which can be wired to the…

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Can Corrosion Cause Wiring Malfunctions

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