My 1994 740iL (85k miles) runs fine, however when the transmission is downshifting (as the car slows) the headlights dim momentarily then come back to normal intensity. Normal cruising at steady speed – no problem. At first I suspected the alternator, since the headlights exhibit the same dimming when the car is in reverse. (backup lights taking the juice?) The puzzling thing is I don’t seem to be losing the battery charge, and the dash lights, fan blower speed, etc are not affected. Has anyone had a similar problem, or some idea of the cause? Thanks