Interior courtesy lights

[Jay M]

S Heads, This is not a big deal to me but it is just puzzling me. I am curious to know what's going on (or not going on in this case) and if anybody else has experienced this before. One of my UrS6 cars has been suffering from a weak battery. Today I went to the car to start it, opened the driver door. The front dome-light by sunroof control illuminated as it should in addition to the two lights over each rear door. I started to crank the engine. The engine cranked about 3-4 times before the battery lost cranking power. I hooked up battery charger and charged for a couple hours. After charging I opened the driver door and noticed that none of the interior lights lit up as before. I moved the 3 way toggle switch for the front light by the sunroof control and moved it all the way forward towards the front of the car and light turned on (as it should in this position). Moved switch to the middle off position and light did not come on (this is normal). I moved the switch all the way back towards the rear of the car (this is the position the switch was in before and allows the lights to turn on when the door is opened and turns off after approximately 20 second delay or when key turns over ignition) and the light does not come on as it should with the door opened. Both lights above the rear doors expereience the same symptoms and the lights don't come on when any of the four doors are opened. I thought maybe the plunger switches that are located in the door jambs may be sticky so I jiggled them around to no avail. I don't think it is a fuse because all the lights work when the switch turns them on but none of them work when the switches are in the position for them to turn on when the doors are open. Any ideas? Thanks.