CERTAIN AFTERMARKET DIAMOND STAR HEADLIGHT MODULE SWITCHES P/NOS. 01010 AND 10112, MANUFACTURED BETWEEN JANUARY 2001 AND AUGUST 24, 2005, BY SIGNAL DYNAMICS FOR USE ON MOTORCYCLES. WHEN THE COMMAND SWITCH IS IN THE NOVA MODE, THE MODULE WILL MODULATE AT A HIGHER RATE THAN ALLOWED BY FEDERAL MOTOR VEHICLE SAFETY STANDARD NO. 108, LAMPS, REFLECTIVE DEVICES, AND ASSOCIATED EQUIPMENT. IF THE MODULE IS CONNECTED TO THE HORN SYSTEM OF THE BIKE, AND THE HORN IS PRESSED AFTER DARK THE MODULE WILL CAUSE THE HEADLIGHT TO MODULATE FOR 3 SECONDS. FEDERAL MOTOR VEHICLE SAFETY STANDARD DOES NOT ALLOW FOR MODULATION AFTER DARK.