Yes, if the battery is re-connected witht the air bag unplugged, the ECU will illuminate the air bag light to indicate a fault within the air bag system.
What most of us would probably do is to leave the air bag disconected, re-connect the battery, and finish working on the window regulator. This will result in an air bag light. Then we'd clear the air bag light in 2 mins using our Durametric. Simple, easy, and most important, safe.
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1999 996 C2 - sold - bought back - sold for more
1997 Spec Boxster BSR #254
1979 911 SC
POC Licensed DE/TT Instructor
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