It sounds as if one of the pins is either damaged on a connector or in the wrong place from the factory on the Curt T-Connector Vehicle Wiring Harness # C56224.
First check the connectors on the Curt harness for any pins or receptacles that appear to be bent, broken, pushed out of their socket or damaged in any way.
The only way to determine if one of the wires is installed in the wrong location is to trace the wires on the Curt harness. Since most of the wires used on the right side... view full answer...
Thank you for the photo of the display on your Curt TriFlex trailer brake controller # C24VV that shows what looks like a letter U. There is no such actual letter U among the various operating and troubleshooting codes so I think potentially what may have happened is that part of the display has failed, and it is no longer showing the entire code.
The nearest codes to what your unit shows are L.1., which indicates the unit's selected sensitivity level; and L.b., which indicates that the... view full answer...
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