What Does OL Error Mean on the Draw-Tite Activator II Trailer Brake Controller

Question:

What does OL mean on the readout and how do I rectify it?

asked by: Bill

Expert Reply:

What you are experiencing is an overload or short somewhere in the brake circuit connected to the Draw-Tite Activator II Brake Controller, part # 5500. Closely examine the brake output wire (usually blue). Make sure all connections are tight, and that the wire is not pinched or the insulation is not worn or nicked, allowing the conductor to short out on the trailer frame.

Check the trailer and vehicle side connectors for dirt or corrosion build up in the plugs and in the back of each plug where the wires are. Corrosion and/or dirt can cause a short.

You can also test the brake magnets and wiring. Start by visually inspecting the magnets for wear. If you can see the windings coming through the magnets will need to be replaced. Check the power wire and grounds for the magnets. Make sure the power wiring is securely attached with no nicks in the wire. Make sure the grounds are connected to a clean and corrosion free metal surface. To further test the magnets, I have included a link to an FAQ article that may help.

I have included links to some additional information on testing your wiring, as well as a typical installation video for the # 5500 and a video demonstration on some basic wiring troubleshooting.

expert reply by: DeAnne T