DocOhm
Well-known member
Many C5s have a problem where the top of the turn signal gets cracks in it from the heat of the bulb. When it gets wet water gets in there and breaks the light bulb. Here's a video on how to fix that using JB weld. It's been many years since I've fixed mine and I haven't changed a bulb since I did this fix.
C5 Turn Signal - YouTube
C5 Turn Signal - YouTube