Something isn't right here. When you open the door you should have 5 - 5 watt bulbs turning on, 2.08 amps (@12 volts). Maybe you have led's installed, but I'm leaning toward your meter being the problem.
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Yes, weird things happen when the 9V batteries in meters get low
40mA doesn't sound too terrible. I had 180mA draw after car-off and it was because my passenger-side seatbelt clip was shorted and keeping a circuit active. You might check this out on your car, here's a thread I made on 3si about it: SOLVED: Driver side door switch lights stay on - HIGH OFF CURRENT - common problem - 3000GT/Stealth International Message Center
You know I was wondering kinda the same from vids I watched on youtube. I have confirmed that the Stealth has the old school bulbs in there, actually swapped a couple out for new ones. Do I have my multi-meter hooked up right per the photo I left in one of my responses?