Nope...it should just work. The tail lights alone would light up that area like a christmas tree. Something else must be amiss.
But...why do you mention Jensen in this thread? We do not route the backup camera to the jensen. We route it to the rear view mirror monitor. There is a camera input on the jense but we don't use it cause you'd be changing back and forth from GPS to radio to back up camera.
PLEASE do not send questions via Private Message, my inbox fills up too quickly. Post questions in the forum as a new thread so that other users can benefit from the answers. Use Private Messages for sensitive information only (VIN, Contact info or things you do not want the public to see).