How to Wire Trailer Clearance Lights with Black and Red Wires
Updated 08/05/2024 | Published 10/07/2019 >
Question:
Hi, marker lights have a two cables black and red,what we should connect to them brown cable and white cable?
asked by: Jan D
Expert Reply:
The brown wire for your trailer wiring should be for the running lights while the white wire should be for ground. Typically clearance lights use black for power and white for ground, like part # MCL32AB, but in the case of black and red wiring the black is typically ground while the red is for power.
This can vary between products but you can simply touch the black power from the light to the white wire from the trailer wiring and then the red wire to your brown wire. If that doesn't work then simply reverse the wiring and your light should work just fine.

Carl H.
8/5/2024
My travel trailer has 1 wire that is white and other is white and green on clearance light. Is white the ground? I am wiring up a camera and cannot experiment

Product Page this Question was Asked From
LED Trailer Clearance or Side Marker Light w/ Reflex Reflector- 3 Diodes - White Base - Amber Lens
- Trailer Lights
- Clearance Lights
- Rear Clearance
- Side Marker
- Rectangle
- Surface Mount
- Non-Submersible Lights
- LED Light
- 4L x 2W Inch
- Amber
- Optronics
more information >
Continue Researching
- Shop: etrailer Electric Trailer Jack w/ Foot Plate - A-Frame - 14" Lift - 2,000 lbs
- Search Results: trailer lights
- Shop: etrailer Electric Trailer Jack - Drop Leg - A-Frame - 18" Lift - 3,500 lbs
- Search Results: trailer jack
- Search Results: electric jack trailer jack
- Shop: etrailer Electric Trailer Jack w/ 7-Way - Drop Leg - A-Frame - 22-1/2" Lift - 5K
- Article: Trailer Wiring Diagrams
- Search Results: side marker lights
- Q&A: How to Wire Marker Light With Red and Black Wires
- Search Results: 7~way plug
- Search Results: 7 wire trailer plug
- Search Results: 7 way plug with pigtail
- Video: The Low-Down on the Miro-Flex LED Trailer Side Marker Light and Mid-Ship Turn Signal
- Shop: Thinline LED Trailer Clearance or Side Marker Light - Submerisble - 2 Diodes - Amber Lens
- Shop: Miro-Flex Thinline LED Trailer Clearance or Side Marker Light - Sumbersible - 4 Diodes - Amber Lens
- Shop: Trailer Hitch
- Shop: Curt RVi Series 4 Portable Flat Tow Brake System - Wireless Monitor - Proportional
- Shop: Furrion Vision S+ Wireless RV Observation System w/ 4 Cameras - 7" Screen
- Q&A: What Fastener to Use for Installing Optronics Thin Line Series Light Mounting Bracket # A65PB
- Shop: Trailer Wiring
- Q&A: Flat Tow Set-Up for 2022 Jeep Gladiator Mojave
- Q&A: How To Turn off Start/Stop on a 2022 Jeep Gladiator and Upgrade to LED Lights
- Shop: Vehicle Lights
- Q&A: Installing LED Clearance Lights With 2 Wires
- Shop: RV Camera
- Shop: Vehicle Tow Bar Brake System
- Q&A: LED Trailer Clearance Light Recommendation with 3 inch Hole Spacing
- Shop: Base Plate for Tow Bar
- Shop: Vehicle Tow Bar Wiring
- Q&A: Black and Red Wire Connection on Trailer Tail Lights


Great W.
10/29/2021
Helped answer my question thank You