How To Wire LED Trailer License Plate Light For Cargo Carrier To A 4 Way Flat

Updated 04/28/2024 | Published 03/31/2021

Products Featured in This Question

Optronics LED Trailer License Plate Light w/ Bracket - 5 Diodes - Clear Lens

(632)

$19.26

Hopkins Endurance Easy-Pull Harness w/ 4-Pole Flat Connector - Trailer End - Jacketed - 48"

(141)

$10.80

Question:

My 2021 Subaru Ascent has both 7-pin and 4-pin trailer harness connections. Can I buy a mating plug-in harness that already has wires that could be used to provide power to this license plate light for use with a bike rack? Im trying to avoid unnecessarily tapping into the vehicles wiring.

asked by: David K

Expert Reply:

I have a solution for you to hook up the Optronics LED Trailer License Plate Light w/ Bracket # LPL55CB to your 2021 Subaru Ascent without tapping into the wiring. You could install Hopkins Endurance Easy-Pull Harness w/ 4-Pole Flat Connector - Trailer End - Jacketed - 48" # HM38134 into the 4 way flat plug at the back of your vehicle which would provide you with 4 bare wires. You could then wire the white ground wire on the LED lights to the white wire on the Hopkins 4 way harness. Then connect the black wire on the LED lights to the brown tail light wire on the Hopkins 4 way harness. This will illuminate the license plate light when you have your running lights on, and you can simply unplug the 4 way harness form your vehicle's trailer plug when you are done using it. I attached a video for you along with a wiring diagram of the 4 way trailer plug.

expert reply by: Andrew N