When you tow a trailer, your vehicle has to have a different turn signal flasher and extra wiring. The green arrows on your instrument panel will flash whenever you signal a turn or lane change. Properly connected, the trailer lights will also flash to alert other drivers you’re about to turn, change lanes, or stop.
When towing a trailer, the green arrows on your instrument panel will flash for turns even if the bulbs on the trailer are burned out. Thus, you may think drivers behind you are seeing your signals when, in fact, they are not. It is important to check occasionally to be sure the trailer bulbs are still working. You must also check the lights every time you disconnect and then reconnect the wires.
Do not connect a trailer lighting system directly to your vehicle’s lighting system. Use only an approved trailer wiring harness.
An authorized Kia dealer can assist you in installing the wiring harness.
WARNING
Failure to use an approved trailer wiring harness could result in damage to the vehicle electrical system and/or personal injury.
Kia Cee'd JD Service Manual: Panoramaroof Motor Repair procedures
Inspection
1.
Disconnect the negative (-) battery terminal.
2.
Remove the roof trim assembly.
(Refer to Body - "Roof Trim Assembly")
3.
Disconnect the connector (A).
4 ...
Kia Cee'd JD Service Manual: Heated Steering wheel Schematic diagrams
System Circuit Diagram
Terminal Function
Housing
Pin
Function
Wire color
Pad
A
GND
Back
B
HEATER
Yellow
...