Kia Forte: Troubleshooting - Lighting System - Body Electrical System - Kia Forte TD 2014-2019 Service ManualKia Forte: Troubleshooting

Second generation YD (2014-2019) / Kia Forte TD 2014-2019 Service Manual / Body Electrical System / Lighting System / Troubleshooting

1.
The lamp switch inputs can be checked using the GDS.
2.
To check the input value of lamp switch, select option "Body Control Module".
3.
To consult the present input/output value of BCM, "Current DATA". It provides information of BCM input/output conditions of power supply, turn signal/brake lamp, headlamp, door, locks, outside mirror, wiper, auto-light and transmitters etc.

4.
To check the input value of lamp switch in force mode, select option "Actuation Test".

Symptom
Possible cause
Remedy
One lamp does not light
(all exterior)
Bulb burned out
Replace bulb
Socket, wiring or ground faulty
Repair if necessary
Head lamps do not light
Bulb burned out
Replace bulb
Ignition fuse (LOW:10A, HIGH:20A) blown
Check for short and replace fuse
Head lamp fuse (15A) blown
Check for short and replace fuse
Head lamp relay faulty
Check relay
Lighting switch faulty
Check switch
Wiring or ground faulty
Repair if necessary
Tail lamps and license plate lamps do not light
Bulb burned out
Replace bulb
Tail lamp fuse (10A) blown
Check for short and replace fuse
Tail lamp relay faulty
Check relay
Lighting switch faulty
Check switch
Wiring or ground faulty
Repair if necessary
Stop lamps do not light
Bulb burned out
Replace bulb
Stop lamp fuse (15A) blown
Check for short and replace fuse
Stop lamp switch faulty
Adjust or replace switch
Wiring or ground faulty
Repair if necessary
Stop lamps do not turn off
Stop lamp switch faulty
Repair or replace switch
Instrument lamps do not light
(Tail lamps light)
Rheostat faulty
Check rheostat
Wiring or ground faulty
Repair if necessary
Turn signal lamp does not flash on one side
Bulb burned out
Replace bulb
Turn signal switch faulty
Check switch
Wiring or ground faulty
Repair if necessary
Turn signal lamps do not light
Bulb burned out
Replace bulb
Turn signal lamp fuse (10A) blown
Check for short and replace fuse
Flasher unit faulty
Check flasher unit
Turn signal switch faulty
Check switch
Wiring or ground faulty
Repair if necessary
Hazard warning lamps do not light
Bulb burned out
Replace bulb
Hazard warning lamp fuse (15A) blown
Check for short and replace fuse
Flasher unit faulty
Check flasher unit
Hazard switch faulty
Check switch
Wiring or ground faulty
Repair if necessary
Flasher rate too slow or too fast
Lamps' wattages are smaller or larger than specified
Replace lamps
Flasher unit faulty
Check flasher unit
Back up lamps do not light
Bulb burned out
Replace bulb
Back up lamp fuse (10A) blown
Check for short and replace fuse
Back up lamp switch (M/T) faulty
Check switch
Transaxle range switch (A/T) faulty
Check switch
Wiring or ground faulty
Repair if necessary
Room lamp does not light
Bulb burned out
Replace bulb
Room lamp fuse (10A) blown
Check for short and replace fuse
Room lamp switch faulty
Check switch
Wiring or ground faulty
Repair if necessary
Front fog lamps do not light
Bulb burned out
Replace bulb
Front fog lamp fuse (15A) blown
Check for short and replace fuse
Front fog lamp relay faulty
Check relay
Front fog lamp switch faulty
Check switch
Wiring or ground faulty
Repair if necessary
Rear fog lamps do not light
Rear fog lamp fuse (15A) blown
Check for short and replace fuse
Rear fog lamp fuse (15A) blown
Check for short and replace fuse
Rear fog lamp switch faulty
Check switch
Rear fog lamp relay faulty
Check relay
Wiring or ground faulty
Repair if necessary
Map lamp does not light
Bulb burned out
Replace bulb
Room lamp fuse (10A) blown
Check for short and replace fuse
Map lamp switch faulty
Check switch
Wiring or ground faulty
Repair if necessary
Trunk room lamp does not light
Bulb burned out
Replace bulb
Room lamp fuse (10A) blown
Check for short and replace fuse
Trunk room lamp switch faulty
Check switch
Wiring or ground faulty
Repair if necessary

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