Electrical mystery.....

Alright boys, I got a goodun. Get this. My driver's side reverse light is hot when the ignition is turned on. No biggie, probably something up with the reverse light switch or wiring. Gotta pull the transmission back out anyway, so I'll look at that then.

Anyway.......The passenger side light doesn't work. However, it has power AND ground going to the bulb. The bulb is good. How do I know? I took the driver's side bulb out and swapped the passenger's side bulb in. Bam it burns. Put the driver's side bulb in the passengers side and nothing. So what could be goin on here?

Are you positive that the socket is grounding to the housing and you have a good ground?