Lamp Out Indicator: Description and Operation

1984---87 LINCOLN CONTINENTAL & MARK VII
The lamp-out warning system monitors low beam headlamps, tail lamps and brake lamps. Lamp outages are sensed by measuring change in voltage drop across a section of wiring harness by a transistor-diode bridge. The warning lights are located on the roof console. The lamp-out warning system operates when ignition is in ACC or RUN position. If one or more low beam lamps are burned out when headlamps are energized in low beam mode, the headlamp warning lamp will light. The tail lamp warning lamp will light when the headlamp switch is energized and one or more tail lamps are burned out. The brake lamp warning lamp will light when brakes are applied or the turn signal or emergency flashers are activated and one or more brake lamps are burned out.