ABS sensor problems

For: 2002 Rodeo, RWD 3.2LV6, 154K miles

I ran through the protocol posted somewhere else on this forum to read the codes for my ABS system:

Code flash out: 51
Diagnosis: FL open or shorted

Code flash out: 52
Diagnosis: FR open or shorted

Code flash out: 61
Diagnosis: FL missing signal sensor AND/OR sensor signal dropout

Code flash out: 62
Diagnosis: FR missing signal sensor AND/OR sensor signal dropout

seems suspicious that both would fail and was wondering if anyone has had a similar problem or any recs. on how to remedy. Also, if someone has a wiring diagram / picture for the ABS system it would be appreciated. I'm about to replace the rotors (finally replacing originals!) and would like to take care of this at the same time.

cheers,

James