Wondering the same, have you found out yet?
I saw someone installing a vent light by splicing the side marker lights. And they stay on when driving, but mine doesn't.
I checked my F150, and they are on when parked only. I don't know how they did that
Got you. I thought mine was fucked up or something. It never happened on my 23 tremor, it had a reflector led headlight as well. But that one had pin 3 for DRL.
Thank you