Troubleshooting a Brake Controller with and OC Error Code

Question

Question:

Can we still pull a trailer with the OC error? Is it safe?

asked by: Mallory

0

Expert Reply:

My technical contact at Tekonsha informed me that an OC error code is typically displayed on a Hayes manufactured product. The error OC translates to open circuit, which indicates that there is not a proper connection to the trailer brakes.

This is the same as a NC error code on a Tekonsha, Draw-Tite, Hidden Hitch, or TrailerMate product. Which indicates one of the following: the trailer not being connected to the tow vehicle, the trailer is connected but there is an open circuit on the brake line, trailer connector disconnected or corroded (vehicle side or trailer side), loss of trailer brake magnet ground, or the brake magnets are worn/shorted out.

It is NOT recommended to tow your trailer if you see this error code. This error code indicates that the brakes are not functioning, and it is not safe to tow your trailer.

To troubleshoot this you will first want to isolate the issue to the vehicle or to the trailer. I suggest hooking up to a second vehicle that has a brake controller and see if the same error code is present. If this is the case then the issue is with the trailer. If you do not see the see the error code then it is an issue with the vehicle.

My first suggestion for troubleshooting this is to check the vehicle connection point and make sure that all the pin/blades are functional and there is no sign of damage or corrosion at the vehicle connection point and the wires leading to it. You will want to use a circuit tester like part # PTW2993 to verify the functions of the pin/blades while that function is activated.

I have included a helpful article that explains how to troubleshooting brake controller issues.

You will also want to make sure that all the grounding wires are properly secured to an appropriate bare metal surface. This might also cause an open circuit display.

The next step is to test the wires leading to and from the brake controller. You will need to use a circuit tester again and test the wires leading to and from the brake controller and make sure that it is receiving and sending the proper signals. You may need to increase the power output level for testing these functions.

If you determine that the issue is related to the trailer then I suggest also inspecting the trailer connector for any signs of corrosion, damage or and loose wires. Next you will also want to inspect the magnets on the brakes of the trailer. You will want to make sure that the magnets are properly grounded, in good condition, and the wiring to them is functional.

I have included a second helpful article that explains the process of testing trailer brake magnets.

I have included links to the part referenced above, and several helpful articles for your reference.

expert reply by: Rachael H

0

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Answer 2

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Answer 8

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