when you open the door the panel where the car door latch and hand rest, and door control is located you will have to remove all screws and buy tools to remove panels on the door, most just pop out or on a slide, remove power equipment, door handle, there be screw in the door handle area. after getting the panel loosen you will have to lift it up wards, after removing the panel, there will be some type of plastic just cut it or remove it. you are going to need service manual or diagram of the door working, you may find the info online, library, shop that will copy the material, here is some other sites that mite have what you are looking for.:
www.ask.com
www.about.com
www.info.com
www.wiki.org
www.youtube.com
______________________IMPORTANT___________________________
YOU SHOULD HAVE A SERVICE MANUAL FOR THE CAR THEY MITE HAVE A ROW OF RELAY ALONG THE FIREWALL UNDER THE HOOD OF THE, AND IN THE NEWER CARS OR TRUCKS THE RELAY IS LOCATED IN THE FUSE BOX AREA AND IF YOU LOOK AT THE DIAGRAM ON THE INSIDE COVER OF THE FUSE BOX IT WILL SHOW WHERE THAT LOCATION IS.
AND NOTE. *** SOMETIME THEY WILL ONLY PUT THE AMPS
IN A GROUP OF NUMBERS AND WITHOUT A MANUAL YOUR GUESS IS AS GOOD AS MINE*****************
IT MAY BE THE OWNER MANUAL
AT THE AUTO PART STORE THEY MAYBE HAVE ALL THE ANSWERS I SPENT WRITING THIS LONG LETTER
THANK YOU ROD