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The microprocessor controlled BUSF200 Headlight Flasher has five outputs for school bus hazard lights on 12V or 24V negative earth vehicles. The alternating outputs and strobe output draw their current from the main supply input, with a small current drawn by the “ON” switch. The alternating headlight outputs, the strobe output and the high beam disable operate only while the door is open. The alternating amber flashing lights (“WIG-WAG”) outputs operate while the door is open and for 20 seconds after it is closed. The two “DOOR OPEN” inputs allow for either a positive or ground signal to trigger the BUSF200, depending on vehicle door switch wiring.