Recently I replaced my rear rotors calipers and pads. I had a functioning ebrake, but it stopped working recently.

My ABS light and brake light is on. Does anyone know as to why this would happen?

Additionally, I don't have a working ebrake.

Does anyone know where to start?

Which is why I'm puzzled. The new calipers are fully functional, and everything seems in order, but the brake just isn't there.