My low beams don't work, but the high beams do.on a buick century

Wtf is an autonator, that has nothing to do with headlights. you obviously are not qualified to answer the question. the headlights could be out due to a wiring harness issue, some parts of the wire have no plastic covering over them to protect the insulation from being cut by vibrating against any metal part so when that happens it will short out. sometimes its corrosion related as well and need to remove corrosion from the plug using some sandpaper or wire brush and then use some dilectric grease in the connector to prevent it from corroding again.

You have a ground wire loose or need new bulbs bc they r fixing to go out or the autonator isnt chargeing like it suppose to be