It looks like you're new here. If you want to get involved, click one of these buttons!
2002 ASTRO Van Tail light Mystery bulb
My 2002 ASTRO tailight has two ordinary bulbs for the lights, turn and backup.
In the middle of the housing is a small silver bulb about the size of a pea. I broke it trying to remove it. I CANNOT see what it does - Everything works after I replaced the regular turn signal bulb. I searched and the socket looks like a "SIDE MARKER" socket - but there is no side marker in the rear. And I cannot find a replacement bulb spec. What the heck is that small bulb in the middle for??