When replacing the metal wheels for any reason, make sure the new wheels are equivalent to the original factory units in diameter, rim width and offset.
WARNING
A wheel that is not the correct size may adversely affect wheel and bearing life, braking and stopping abilities, handling characteristics, ground clearance, body-to-tire clearance, snow chain clearance, speedometer and odometer calibration, headlight aim and bumper height.
Kia Cee'd JD Service Manual: Master Cylinder Repair procedures
Removal [LHD]
1.
Turm ignition switch OFF and disconnect the negative (-) battery cable.
2.
Remove the battery.
(Refer to Engine Electrical system-"Battery")
3.
Remove the ECM.
...
Kia Cee'd JD Service Manual: Repair procedures
Inspection
Test the horn by connecting battery voltage to the 1 terminal and ground the
2 terminal.
The horn should make a sound. If the horn fails to make a sound, replace it.
Horn Relay Inspection
1.
Remove the horn relay (A) from the engine room ...