Prodigy P2 Brake Controller 90885 Display Indicates .C. Trailer Connected Without Trailer Connected

Question:

Why is it flashing .c. When I just hooked it up and trailer is not hooked up

asked by: Craig

Expert Reply:

The display symbol .C. on the Tekonsha Prodigy P2 Brake Controller # 90885 indicates that the controller senses the presence of a connected trailer's electric brake circuit and that the boost feature is engaged.

If this happens without a trailer hooked up the cause is likely to be corrosion within the trailer connector on the vehicle that could be causing separate circuits to be bridged together. This could fool the controller into acting like a trailer is connected.

Check the socket itself and the connector on the wiring harness leading to it for any signs of physical damage, trapped water or foreign material or the build-up of corrosion. You can also check the two linked articles for more on testing and troubleshooting brake controller installations.

expert reply by: Adam R