Find an existing hole or harness that is going through, like the big rubber boot on the passenger side that runs your engine harness, then just unwind a clothes hanger and push the wire through with that. Or if your can find room through the steering column hole, if your automatic, theres a little rubber gromet where your clutch master cylinder would normally be and you can run a wire from there just by getting under your dash by the pedals.
At most the only thing you may have to take out is your glove box.