How to Install Courtesy Lights on Accord 2018+ for Added Convenience

Hey everyone,

I recently installed courtesy lights on my Accord 2018+ and wanted to share the procedure with you. If you're looking for a simple way to add convenience to your vehicle, installing courtesy lights is a great option. These lights provide illumination when you open the doors, making it easier to see and navigate your surroundings.

Here's what you'll need for the installation:

2x T10 hard socket
2x T10 bulbs
2x 1m wire, different colors
Textile tape
2x tap wire connector
2x Honda lenses 34261-TLO-003
Utility knife
Multimeter

Procedure:

Prepare the T10 sockets by attaching longer wires of about 40-50cm. You can either solder or use wire joints. One side (GND) should be longer than the other by about 10cm. Tape the wires with textile tape about 30cm from the socket.
Remove the control panel from the door and disconnect the big gray connector.
Deinstall the door panel.
In the big gray connector, there are four big pins on the sides. One of them always has 12V, which in my case was red in color. Find and confirm using a multimeter.
Attach a shorter wire to it using a tap connector.
On the left of the driver side door, there is another connector plugged into the door lock. Remove the factory tape from the harness, about 3cm.
Find the dark green cable and using a utility knife, carefully remove the insulation. Wind the second wire on this green cable and insulate it with tape. If you add a bulb into the socket, it should light up.
Use textile tape to attach the wires to the factory harness on both sides.
Remove the factory dummy cover from the door panel and install the socket into it.
Install the panel back to the doors, reinstall the control panel. Finally, add the Honda lens, and you can proceed to the passenger side door. There are two differences:
- 12V is on the light green cable on the big gray connector.
- In the door lock connector, the right cable is light green.

That's it! I hope you find this procedure helpful. If you have any questions or suggestions, feel free to ask. Check out the attached photos for reference.

Happy DIY-ing!