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Troubleshooting Reese Electric Brake Controller That Displays OL Overload Code


When I plug in with a 6 or 7 pole plug I get OL on the controller. When I put a 6 to 7 pole adapter on the trailer plug and plug in, the controller works properly and shows numbers. When I plug the 7 pole tow vehicle in on another 7 pole trailer I get numbers and no OL on the controller. Whats is wrong. Ive checked and tightened all grounds. Thank you.


Expert Reply:

The OL or Overload error code is displayed when the brake circuit is drawing too much current, possibly caused by a short on the brake wire or a poor ground connection at the brake magnets.

Your situation is a bit confusing so the best recommendation I can make is to try and find anything that could be causing a short on the brake output circuit when the setup gives you the OL code.

expert reply by:
Jameson C

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