Kia Carnival 2007 Workshop Manual page 1270

5. Installation is the reverse of removal.
INSPECTION
SLIDE MOTOR LIMIT SWITCH
1. Disconnect the limit switch and operate the limit switch.
2. Check for continuity between the terminals.
3. Make sure that the seat operation is normal in the reverse after the maximum operation.
4. If operation is not correct, replace the limit switch.
POWER SEAT MOTOR
1. Disconnect the connectors for each motor.
2. With the battery connected directly to the motor terminals, check if the motors run smoothly.
3. Reverse the connections and check that the motor turns in reverse.
4. If operation is not correct, replace the motors.