Signal lights completely gone

I've had an intermittent issue with my front passenger signal light, sometimes it works, sometimes it doesn't, and I get the rapid flash.
Last night I stalled going up a steep driveway and since then, for whatever reason (not sure it's even connected, or if it's a coincidence), turn signals don't even work, front/back, left/right.
Parking light does work front and back on the driver's side, and brake light as well. Seems like the whole right side is a dud.
However, emergency flashers work all around, except for the passenger side front.

Is this a simple fuse and/or relay, or is it potentially something more complicated?
My truck is a '96 3.4L 4x4.

EDIT:
I had read online that by engaging the four-way flashers, it somehow resets the signal lights... and sure enough, they're working again! I honestly don't understand why, though....