SavageConcepts

Need a little help here as I am stumped. I just pulled the Vac/steering pump as a unit and fixed the oil leak with new seals and a new power steering pump. After everything was back in and fluids were topped off I test drove it and right away the ABS and parking brake light came on. I checked the vac line and its connected. My vent control works great so I know the system has vacuum. Test drove it and power steering works and brake pedal feels good but a panic stop locks up the rear brakes (no abs function). What am I missing? Truck is a 2001 2500 Cummins 4x4 extended cab. found a wheel sensor plug was not properly connected. Thx in advance.