July 1: So it begins. Don't worry, this is not in the correct legal jurisdiction!

DTC 21: Right Front Wheel Speed Sensor Circuit Open: Notes

NOTE: Test numbers refer to numbers on diagnostic chart. To identify circuits and terminals referenced in text and flowcharts, see WIRING DIAGRAM .

Fig 1: DTC 21 Diagnostic Flow Chart

G96H25368

Courtesy of GENERAL MOTORS CORP.

Measures resistance of 5-way EBCM harness connector terminals "C" and "E".
Measures resistance of right front wheel speed sensor harness.
Measures resistance of right front wheel speed sensor.