You will probably find one or two cells are low. Refill as necessary using WATER only. Preferably distilled water.
As shown above check the corrosion levels in the bulb holders. You can rub them clean with fine emery cloth and a spray of light oil will help further cut the corrosion, and keep it away a while longer. Sand and spray the bases of the bulbs, too.
(contrary to those who say oil is an insulator and it won't work, it does.)
I had both headlights blow in my car this winter......still don't know why, but they went same day so I must acknowledge that it is possible to have two front bulbs go out at once, but it is definitely unusual.
Check the bulbs, and the connectors, but since both are on the front, and on different switched circuits, it is most likely corrosion.
Comment