My New Wiring Diagrams Arrived !!!
I'm all excited !!
So it looks like the dome light is wired a bit different than I thought.
There is a constant +12 V wire going to it and the other is a separate path to ground going through the microprocessor in the cluster as well as a ground going through through the screws into the body.
I'm sure you can get the desired effects you want with the foot well lighting but you will need some kind of circuit to control it.
OR...
You could replace the +12 V feed wire with an ignition wire so that it turns off with the ignition...
The map lights could be fed +12 V normally so you can use them with the key removed.
You might have to feed the ignition wire to the dome light and wire it in there so that the map lights still have power all the time from the original wire, depending on where the splice happens.
Their might be two separate wires leaving the connector, one going to the map, one going to the dome light (as well as the wire going to the cluster for the door switch)
The connector with the wires your interested in the pillar beside the dash at about dash height... X-12.