Thank you for the reply....I thought you needed to take that sill off to get to the wire harness to find the smaller 22 gauge wire for the drives side (I am forgetting the color as I write this, but it is in this string of posts) My plan was to put a magnetic reed switch in line with the wire and ground and then place a magnet on the door pannel....so when the door is open (and the magnet is away) the reed switch will open and not allow the ground inline...when the door closes, the magnet will pull together and allow the ground inline. SO as I understood it, I needed to get to the wiring bundle under the sill to find the right wire (color combination) and basically splice in the switch to all the ground to present itself. Do my assumptions sound correct....?