I've had my truck for two years now, bought it with 7k miles on the odometer. My truck has never had the yellow driving (or parking, not sure what they are) lights that I see on other Tacomas all the time. Were some Tacos wired differently than others, or did the original owner of mine do some wiring of his own?
I'll have to check for sure, but it seems to me that my yellow rectangular lights function as turn signals. I'll check in the morning.