ABS light on, Wheel speed sensor

i have a 2003 chevy s10 extreme w/a 4.3l v6 and a few weeks ago the abs light came on i took the vehicle and had it scanned for trouble codes and got a C0221-RF wheel speed sensor circuit open i would greatly appreciate it if anyone could tell me how to check this and where to find it on the wheel assembly.

i have a 2003 chevy s10 extreme w/a 4.3l v6 and a few weeks ago the abs light came on i took the vehicle and had it scanned for trouble codes and got a C0221-RF wheel speed sensor circuit open i would greatly appreciate it if anyone could tell me how to check this and where to find it on the wheel assembly.

Check for output from sensor when wheel is turning and sensor wiring and plugin.