@hwrd69:
When the map lights come on, they do it by being provided a ground. When opening the door the IBU pulls the circuit for dome light, and through this mod, the map lights to ground, completing the circuit. It sounds like you've got the wiring to the dome light done right so you can scratch that off your list for troubleshooting. That just leaves the dome light circuit. I'd start by disconnecting the battery, pulling the map lights, pressing one of the light buttons, and making sure one side of the bulb has nearly no resistance to ground. If it does, double check to make sure you reversed the two wires for the map light power circuit. The blue with red stripe should be on the left when looking at the plug with the retaining clip facing you.
Hope this helps!