MONITORING CIRCUIT FOR AN ABS WARNING LAMP

摘要

A monitoring circuit (10) for detecting a malfunctioning warning lamp circuit (11) includes a first device (30) for monitoring the voltage within the warning lamp circuit and a second device (40) for monitoring the current through the warning lamp circuit. Each of the monitoring devices has an output which is connected to a decision device (50). The first device (30) generates a first output signal when the monitored voltage is greater than a predetermined voltage and a second output signal when the monitored voltage is less than a predetermined voltage. The second device (40) generates a first output signal when current flows through the lamp and a second output signal when no current is flowing through the lamp. The decision device (50) is responsive to the output signals from the monitoring devices to generate a failure signal when the warning lamp circuit malfunctions.