Tech, is it true that if you pull the radio on an 2001 S40 and probe for 12V power in the connector with a test light its possible to set off the air bag?? Two installers have told me they will not work on an S40 because of this and that after pulling the radio, on about half of them, the air bag light is on after installation. About $50 - $100 to clear at the dealer. What is myth and truth??