Brake Lights Wiring

Nexus Series Firmware Help › Electrical › Brake LightsUpdated Sep 2026

If your Nexus ECU runs the brake lights, it needs to know which output drives them. This wiring page is where you make that assignment.

This page in NSP assigns the Brake Light Output used by the brake lights function. You'll need it when the ECU, rather than a plain pedal switch, switches the lamps, for example to use brake light pulsing under hard braking.

  • Edit: pick an available output, or move the function to a different one.
  • Clear: remove the current assignment.

What to check

  • Make sure the output you pick can handle the current of all your brake lamps. If it can't, switch them through a relay or a PDM channel.
  • The brake pedal switch must be set up under Sensors first, or the function has nothing to act on.
  • Test with the pedal before driving and confirm every lamp lights.

Need this diagram? Ask us and we'll send it over with advice for your build.