[DrCactus]

Hey guys, I took out my rear tail lights and was checking for burned out bulbs when my neighbour and I could not figure out what two of the bulbs do. Two of them would not light up for the life of us.... they did not look burned out either (PASSENGER REAR). The bulbs were on the bottom (row with 4 lights)... can someone identify what each of the bulbs do and bulb replacement size.

Thanks