2004 Licoln Ultimate Towncar Headlight

Left side low beam headlight will not come one. Bulb has been replaced. Does anyone know why not?

Check the Owners manual, there' s probably a fuse for the left side low beam.

Thanks so much for the information. My husband checked the fuse, but, it was ok. He's thinking we will have to replace the ballist, however if you have some other suggestion please post as this replacement is an expensive fix and we would like to know that we have explored all other possible fixes. Thanks again