... manufacture lines. Use condition :1 , Input voltage DC 13.5V ignition point range DC 9~18V2 , Output wattage 35±2W3 , Temp ... the car battery. Check all connections between the bulb, ballast, & igniter. Check the vehicle battery terminal.Only one light works, although ... .Inspection Procedure: Check all connections between the bulb, ballast, & igniter. Check the bulb that does not work. Check the fuses ...