I’m installing a Neutrino Black Box. I started the installation to have automated control of my seat temperature, but since I was digging in I decided to also install Weiser 2 in 1 replacement brake lights and driving lights. I’m atrocious at all things electrical, but so far so good.

The two issues I have so far:

Which wire signals the brake light? I believe my options are red/green, dark blue and light blue.

For switched power to the Weisers, I’m joining the constant power and the switched power into the Black Box. Since the circuit will be switched by the device, combining them should work, correct? I don’t want to have too many taps is my thought process.