As some have noted, there is no switch to turn on all the interior lights on newer TCs. This modification will allow you to turn them on with a separate switch. Opening a door turns on all the lights, so I added a switch that activates the same circuit. You can easily turn on the lights and the van thinks you have opened the driver's door. It works well and the only hitch is you get a "door ajar" message on the message center.  This is not a complete step by step but it covers the tricky pa