Matt, it doesn't take much it seems to go screwy.
(The car, not you - you've been screwy for at least 35 years )
The Mighty Wheeze gets condensation in its R/R tail light, and every couple years I gotta take it apart, clean it, and the signals work well until the next go-round.
290,000 miles now, and I'm gonna see if the little guy will outlive me...