I recently turned on my wipers on a 2000 prelude SH and only the right one worked. What would the problem be?

The rod that is bad, fell off or the wiper itself is stripped out

Hi, this could be three issues, the left arm may be loose. i would check to see if the left wiper arm is loose by looking at the center piece on the Left arm. if you see the motor moving the center piece but the arm isn't moving, this will confirm a loose arm and you will need to tighten the arm screw a bit. Now, if the left wiper arm screw is tight and the arm still dose not move, i would inspect the linkage under the wiper arm housing for lose or broken linkages. if the linkages are fine, it may be the motor itself.

The hold down nut on the left one is loose. Tighten that down and it'll be fine.

The left one might just be loose at the base, unhook the cover with a small screwdriver, and tighten the bolt.