I just hooked up the 12v constant wire and my car wont start. I was doing just this one to make sure it would work and it didnt. Do i have to hook up all the rest of the wires or did i hook it up wrong? The constant from the battery went to the brain and then back to the factory constant. I also hooked up the ground wire cause i thought that might be the reason but its not. I left all the other wires factory. Do i need to run the starter through the alarm to get my car to start even though its still hooked up factory?