Get a tech who has an Autologic or a GT1 to try shutting off the light.

BTW, for future reference, there is no need to disconnect the airbag to do a window regulator. Just hold on to it while you remove the foam sheet from the door, then temporarily bolt it back to the door while working on the regulator. Nor do you need to disconnect the battery....in fact it's very nice to have power to test the regulator before putting the door back together.

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2014 BMW 328i Xdrive
2011 BMW 335i M-Sport
2008 BMW X5 4.8i Sport
2000 BMW 528i 5sp