Iacchus said:
What are you saying nerve signals are not electrical impulses? And yes, it's through electrical impulses (nerve signals) that we're allowed to utter noises through our vocal chords. I'm not saying these signals originate from the vocal chords, however. Which is rather obvious. Sorry, if it "may" have come across that way. 
Well...no, actually, they are not electrical impulses. Rather, it is a self-propogating "wave" of ions (predominately sodium and potassium) across the semi-permeable cell membrane, to the axon terminals where neurotransmitters are released into the synaptic gap, to stimulate the post-synaptic dendrites. There are no sparks, no "electrical impulses" like you would find in wires.
And as for the fact that the signals originate from somewhere else...the "obvious"-ness of this fact is great in hindsight, but it comes from an awful lot of good scientific research...not from introspection about the process.
And exactly why did you put quotation marks around "may"?
Well, at the very least signals are picked up from the external environment. And yet what we have to ask ourselves, is who or what is it that's interacting with these signals? Certainly not the brain alone which, is merely the receptacle of the "conscious will" or, "entity" that resides in the body.
The signals we pick up from the environment come in the form of visual, auditory, olfactory, gustatory, and tactile stimuli--in other words, the known senses. There is no evidence whatsoever for a "consciousness signal" of any form.
"Certainly not the brain alone"? As a behaviorist, I would include the rest of the body as well, but I fear this is not what you mean. You claim there is a "conscious will"...do you have any evidence for one, apart from the sensory input I mentioned above? If you do, you are the first with such evidence. Where does this "entity" reside in the body? What is your evidence? How do you know?
And yet isn't this what we (you) are inquiring about, whether this additional layer is actually there? And now you're saying you don't want to know?
If the evidence suggests that an additional layer is needed, then we will move in that direction. And we will be ecstatic to do so. We would love to know something like this--why do you suggest we might not? Do you have some sort of fundamental misunderstanding of what science is?
And once the ignition is shut off and the driver steps out of the car, where does the car go? This would be akin to someone who has died by the way ... or, is perhaps comatose.
Where does the car go? It sits there in the driveway! Iacchus, this is
not akin to death or coma, unless and until somebody comes up with the evidence to suggest such a thing. Ignorance is not evidence. Incredulity is not evidence. Your dreams...are not evidence.