Differences in Trailer Taillight Wiring Harnesses Available for 2015 Mazda 3

Updated 02/22/2022 | Published 02/20/2022

Question:

Im looking for a wire harness and I found you offer 3 different ones, C55567, 118405, and the HM11141824. what is the difference? are they all the same.

asked by: Kenneth L

Expert Reply:

The Curt # C55567, Tekonsha # 118405 and the Hopkins # HM11141824 all serve the same function, and would all install in the same manner. The Hopkins and Curt models have a very slightly larger amp capacity for the stop/turn lamp signal at 3A per circuit versus the 2.1A per circuit offered by the Tekonsha model. All three harnesses are a fit for all models of the 2015 Mazda 3.

Typically, I'd recommend the model with the highest capacity, but not in this case. We've found that the Tekonsha taillight converter harnesses are more reliable in the long run, so I'd recommend the # 118405 over the other two. The slightly lower capacity won't matter unless your trailer has more lamps on it in addition to the stop/turn/taillight typically found on a small trailer.

I've linked to an install video for the Tekonsha # 118405.

expert reply by: Mike L