 Where I walk you through the diagnosis of an ABS controller. And I show you the powers and grounds and how we tested it. And I use some information from the boys over at Opus IVS. Really the best darn scan tool in the world. And I also show you how we actuate the headlight in the circuit. We turn the headlight on. The headlight goes boink and it goes on. So you know the computer is capable of actuating it using a scan tool.