Patent ID: 8912721

Claim:
A lamp driver, comprising: a logic circuit operative to implement an exclusive or (XOR) logic function between its inputs and its output, the logic circuit comprising: a marker function input operatively coupled to a marker function wire of a vehicle; a turn function input operatively coupled to a turn function wire of said vehicle; a lamp driver output; a first diode having a first anode and a first cathode, the first anode operatively connected to the marker function input; a second diode having a second anode and a second cathode, the second anode operatively connected to the turn function input, the second cathode operatively connected to the first cathode; and a first switching device configured to supply power to the lamp driver output through at least one of the diodes if either the turn input or marker input is high, the first switching device further configured to block power to the lamp driver output if both the turn and marker inputs are high.