Dim Trailer Lights with Curt T-Connector Installed on 2017 Mazda CX-3 with Vehicle Off

Updated 07/31/2019 | Published 07/30/2019

Question:

Ive installed a C56300 on a 2017 CX-3, the first time I plugged my trailer on it, it worked perfectly but after that, the lights would stay on, very dimmed, but on all the time, even when the car is of. Ive then replace the module and the same situation rehappened. I doubt that the wiring on the trailer is the problem, since I used it on another car plenty of times, without any issues. Before I replace it again, what should I test or verify ?

asked by: Alexandre R

Expert Reply:

If sounds like you may have LED lights on the trailer you are towing your 2017 Mazda CX-3 with. What is likely happening is that is a little bit of power on the lighting circuits for the T-Connector # C56300 and since LEDs use next to no power that little bit of power is getting through to the LEDs. I confirmed this with my contact at Curt.

If this is the case then the only things you can really do is just unplug your trailer wiring when you will be leaving it parked for long periods of time or change out your LED trailer lights for incandescent bulbs. If you have incandescent bulbs on your trailer please let me know and I can help you troubleshoot further.

expert reply by: Jon G