Can a Dome Light for a Cargo Trailer W/ a 4-Flat Be Wired to a Wall Switch

Updated 01/27/2026 | Published 08/20/2024

Products Featured in This Question

16 Gauge, 4 Conductor Bonded Parallel Wire - Per Foot

(237)

$2.47

Single Rocker Switch - On/Off - Black

(35)

$14.74

Question:

I want to run the interior utility lights domes with switches of my brand new lightning cargo trailer, which as 4 flat wire plug trailer. I would like to power it to an independant source of power like a power station or a battery . My goal is to not use the power of my vehicule. How can i do this ? Thank you !

asked by: Dino

Expert Reply:

If your trailer has an onboard battery then you can run the light to a switch like the Single Rocker Switch # 37212225, and then from here to a 12v circuit wired to the battery.

expert reply by: Bryce D

Samuel C.

1/27/2026

Hey, how did things go with wiring your trailer lights to the separate battery source? Your update could make it easier for others wanting to power their interior lights without using their vehicle.