If your trailer is equipped with a braking system, make sure it conforms to your country’s regulations and that it is properly installed and operating correctly.
If your trailer weight exceeds the maximum allowed weight without trailer brakes, then the trailer will also require its own brakes as well. Be sure to read and follow the instructions for the trailer brakes so you’ll be able to install, adjust and maintain them properly.
• Do not tap into or modify your vehicle's brake system.
WARNING - Trailer brakes
Do not use a trailer with its own brakes unless you are absolutely certain that you have properly set up the brake system. This is not a task for amateurs. Use an experienced, competent trailer shop for this work.
Kia Cee'd JD Service Manual: Mode Control Actuator Repair procedures
Inspection
1.
Turn the ignition switch OFF.
2.
Disconnect the mode control actuator connector.
3.
Verify that the mode control actuator operates to the defog mode when
connecting 12V to terminal 3 and ...
Kia Cee'd JD Service Manual: Windshield Wiper-Washer Switch Repair procedures
Inspection
Check for continuity between the terminals while operating the wiper and washer
switch. If it is not normal condition, replace wiper and wiper switch.
Wiper Switch
Washer Switch
Rear Wiper Switch
Rear Washer Switch
Removal
...