Need Help 2011 Ram 1500 Both Rear Wheel Speed Sensors

HI as the Title Says i need some Help I have both rear wheel speed sensors giving me codes Specifically Codes C102B(RR Wheel Speed Sensor Circuit), C1027(Left Rear Wheel Sensor Erratic Performance), C1032(Right Rear Wheel Sensor Erratic Performance), and C1020. I have a BRAKE light on and SERV 4WD on the dash even after replacing both of the rear sensors, I inspected wiring to no avail. What should be the next step I should take. The light came on and I got codes for both at the same time. Has anyone else had this problem and fixed it any help would be apricated.