Need some help please. A few weeks ago my D/S headlamp was damaged by a piece of road debris (tire rubber, I think) that was sent airborne by the 18 wheeler that was in front of me going down the highway...it cracked the plastic lens.
A few days later, I noticed that when using my left blinker, it was blinking real fast. I checked, and sure enough, the D/S DRL was out, and not flashing when the left turn blinker was on. I do not know if it had been out since it was hit, and maybe it was just a few days since I used my left turn signal??? I just can't remember.
Anyway, the OEM bulb is 4157NA. Autozone sold me 4157NAK as a replacement. They did not have 4157NA. It is my understanding that the "K" simply refers to Krypton gas used internally giving longer filament/bulb life.
The problem: I have replaced this 3 times in the past few weeks. The bulbs dont appear to be burned out (the filaments are complete, read 0 ohms accross the contacts, and appear normal) but the bulbs stop working. Any ideas why?