Quoted from KornFreak28:
My top box lights behind the translite all work but I noticed I only have one bulb that blinks (the top left one with the red window). That is the only one that blinks. How many bulbs are supposed to blink in the top box? Why do I only have this one bulb blink? All the other bulbs work perfectly in the top box, but the ones that are supposed to blink, don't blink at all, they just stay on. Am I supposed to have a special bulb for the areas that are supposed to blink? Any help is greatly appreciated! Thanks!
The backbox originally had 7 of the 455 blinker bulbs.
The 455 blinker is not a managed flasher and just blinks randomly.
In the link below from the IPDB, the bulbs that are unlit are the 455 blinkers.
Sadly the 455 blinkers are no longer in manufacture. Regular bulbs were put in to replace the blinkers as they wore out.
455 blinkers do exist but the supply is very limited and they can be very expensive.
One can however upgrade the sockets to the wedge style and use the newer 545 blinkers in the same circuit.
You can also replace the missing blinkers with newer blinking LED lights.
But these seem a little bright to me and dont have the side illumination that an incandescent bulb does.
This leads to the odd polka-dot pattern on some back glasses from an LED upgrade.