One problem related to air bag on-off switch has been reported for the 2002 Ford F-150. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2002 Ford F-150 based on all problems reported for the 2002 F-150.
2002 Ford F-150 windshield leaks causing damage to electrical system (fuse box and electrical module). Many issue happening including windshield wipers not working and shorting out the airbag deactivation switch. Windshield repair facility states this was a known issue with the priming of the windshields at installation in manufacturing. Also states it might cause a potential for the windshield to eject itself during a rollover reducing structural integrity of the cab. Dealer who identified the problem stated it was not a known issue but research states otherwise as well as a letter from Ford to the dealerships explaining the issue - #15773.