I was wondering if anyone else ever had this problem,,both the bulbs are good on the driver side but neither the front and back work, the passenger side works fine,,
1.) Swap the bulbs side to side. You might have a small break in the filaments.
2.) Check the sockets for corrosion or damage.
3.) Does the taillight and parking light work OK? If not, look for a bad ground on both front and rear.