I can't find my previous LED light mod thread so I'm posting here, the final outcome. you may remember I modified the courtesy light to create an OEM style internal swithced light without the reading light. Well i went further to create an OEM style single slave light and put one on each side under the shelf supports and wired them into the top lights. The switches are wired as two ways so whichever switch you hit the lights go on or off respectively.
i have no joy in getting photos to work so you can see the pictures here, should be self explanatory.
the LED units are from e-bay and are highly recomended.
I'm really pleased with the end result, massively improves being able to see what you are doing.