Troubleshooting Curt TriFlex Brake Controller that Flashes L.6

Published 02/27/2019

Question:

Still having issues with the controller flashing numbers etc. when it wants to when the key is off. I have probably unplugged it at least 5 times in the last week. It would stop blinking, come back on again in a few hours or the next morning. It has a mind of its own ! This time its been usually the output setting.

asked by: Mick

Helpful Expert Reply:

L.6 is the sensitivity setting your Curt Triflex # C24VV currently has. It has a sensitivity range between L.1 through L.9. Since Curt controllers are known to be a bit buggy this isn't super surprising that you are seeing this. What Curt would recommend is to unplug the controller for a few seconds to let it reset and then plug it back in. Normally this takes care of strange behavior like this.

expert reply by: Jameson C

Mick

2/27/2019

Jameson C.

2/27/2019

If unplugging it and plugging it back in fixes it temporarily then the controller has an internal problem and needs to be replaced. If it makes no difference there's a good chance you have a short between the red wire of the controller and a 12 volt power source. This would cause the controller to think that you are pressing the brakes and to start applying the trailer brakes. I also attached help article that covers troubleshooting brake controllers for you to check out as well.