Check The Power Source Circuit

Disconnect the connector from the ABS control module.
Turn the ignition switch ON, measure the voltage between terminal 32 of the ABS control module harness side connector and body ground.
Specification: approximately B+
Is voltage within specification?
YES
- Check for poor ground.
NO
- Check the harness or connector between the fuse (10A) in the engine compartment junction block and the ABS control module. Repair if necessary.
Fig 1: Checking Connector Between Fuse Engine Compartment Junction Block & ABS Control Module
Courtesy of KIA MOTORS AMERICA, INC.