Flashing OC Code on Hayes Genesis Trailer Brake Controller When Vehicle is Off

Question:

I just disconnected my batteries to work on installing a gauge and when I hooked them back up the controller is flashing OC with the vehicle off. Thoughts?

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Expert Reply:

A brake controller like your Hayes Genesis # HA81790 displays the "OC" message when there is an open circuit, which simply means that the trailer is not connected or the controller does not recognize a connection to the trailer. Since it is coming on when your vehicle is off, I recommend checking the vehicle and trailer connectors for any dirt or corrosion that could be causing this message to appear.

Also, simply sliding the manual override on the brake controller all the way, then letting it snap back a couple of times may reset the code and clear the issue. I also recommend testing the brake controller with your trailer to make sure everything is working okay.

If this does not resolve the issue, please let me know and I will be happy to look into this further.

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Christopher R

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