Do-It-Yourself Story

Opened up door panel, unplugged ribbon cable from old keypad and plugged in new keypad without installing just to verify keypad was the problem. Start button on new keypad worked so I then removed old keypad which is basically just like peeling off a sticker. Next step was to remove leftover adhesive using solvent. This was most time consuming step of the repair. Once adhesive was removed I cleaned the mounting surface thoroughly to ensure new keypad would adhere. I then passed ribbon cable through the door, plugged it in and adhered new keypad to mounting surface. Problem solved...