Note On Intermittents
WARNING: This page is about a different car, the 1990 Cadillac Seville and 1990 Cadillac Eldorado. However, it is still accessible from the selected car via links, so may be relevant.
When IPC II82 input change-of-state indicator displays an "X", check circuit for an intermittent open. Cycle twilight control between OFF and MAX delay. If BCM parameter BD43 does not read 6-94 percent, replace left switch assembly.