Is the Optronics LED Trailer Clearance and Side Marker Light # MCL44AB1 a 1 Wire Light?

Updated 12/15/2025 | Published 11/22/2024

Question:

Yes I was told after a chat conversation with someone, most of my answers were answered. I then called cause I forgot to ask one other question. I just wanted to verify that this was a one wire light. I was assured yes after a brief hold. After which he said yep I looked at the video and it is for sure a one wire light. After getting these it does show one wire coming out the back but inside theres a white wire and looks like there are indeed 2 wires inside. Ill try to hook these up but not sure if these will work properly and Im waiting for a review to just see how these work since the instructions were contradictory.

asked by: Jeremy B

inside the Optronics LED Trailer Clearance and Side Marker
(click to enlarge)

Expert Reply:

Hello Jeremy.

Yes, the Optronics LED Trailer Clearance and Side Marker Light w/ Reflex Reflector - 6 Diodes - Amber Lens # MCL44AB1 is a one wire light. You only need to connect the one wire that is coming out of the back.

expert reply by: Kate F

Kate F.

12/15/2025

Hey Jeremy, how did things go when you hooked up the one-wire Optronics clearance lights? It’d be great to know if they worked as expected with your setup. Your update could make it easier for others sorting out the same wiring question.