Vehicular lamp status display system

A lamp status display system for a vehicle having an electrical signaling system including a plurality of exterior lamps in a physical layout, each connected through a switch to a direct current source, said lamp status display system, which indicates the status of each exterior lamp, comprising:

• a plurality of current indicator units, each current indicator unit, which is connected to one of said exterior lamps, comprising:
• a high input terminal a low input terminal, and an output terminal;
• a sending resistor connected in series from said switch to said exterior lamp, with said high input terminal connected to a high end of said sensing resistor and said low input terminal connected to a low end of said sensing resistor;
• a feedback resistor and an input resistor;
• a differential-input amplifier having a positive input port, an inverting input port, an output port, and a power terminal, wherein said feedback resistor is connected from said inverting input port to said output port, said input resistor is connected from said high input terminal to said inverting input port, said positive input port is connected to said output terminal, said power terminal is connected to said high input terminal, and an indicating means is connected from said output terminal to said power terminal;
• wherein said lamp status display system operates so that said indicating means for each of said exterior lamps lights if and only if current flows through each of said exterior lamps when said switch is closed, where by said indicating means lights if and only if each of said exterior lamps is functional.