What is fed through this fuse?

[Miltrez]

Hey, I live out here in the middle of nowhere. The other day my wifes '99 2.2L 4sp-auto Cavalier started missing and surging after hitting a pretty severe bump. It would still run, just a lot like riding a pissed off horse.

Anyhow, when she got home I checked under the hood, and there is a fuse block assembly on the drivers side wheel well, above the tire - in front of the strut. Opened this up and the 40amp fuse for the ABS system was sticking up about 45 degrees...still making contact (but corroded and not in very good shape visually). Pushed it back into the fuse assembly and it fixed the surging and bucking.

Question is this: What all goes thru the ABS fuse there and why, in y'alls opinion, do you think it could cause this kind of symptom (if i didn't explain the symptom correct, think about an engine that has just gotten wet and is sputtering a little-thats what it did)

Thanks in advance for reply. Oh yeah, the reason "letting your wife drive the car caused it" has already been tried...got me a night on the couch...