Chrysler 300M Service Manual page 340

LH
FOG LAMP (Continued)
CONDITION
FOG LAMPS ARE DIM
WITH ENGINE IDLING OR
IGNITION TURNED OFF.
FOG LAMP BULBS BURN
OUT FREQUENTLY
FOG LAMPS ARE DIM
WITH ENGINE RUNNING
ABOVE IDLE
FOG LAMPS FLASH
RANDOMLY
FOG LAMP DIAGNOSIS
POSSIBLE CAUSES
1. Loose or corroded battery cables.
2. Loose or worn generator drive
belt.
3. Charging system output too low.
4. Battery has insufficient charge.
5. Battery is sulfated or shorted.
6. Poor lighting circuit Z1 ground.
7. Both fog lamps are defective.
1. Charging system output too high.
2. Loose or corroded terminals or
splices in circuit.
1. Charging system output too low.
2. Poor lighting circuit Z1 ground.
3. High resistance in fog lamp circuit.
4. Both fog lamp bulbs defective.
1. Poor lighting circuit Z1-ground.
2. High resistance in fog lamp circuit.
3. Faulty fog lamp switch.
4. Loose or corroded terminals or
splices in circuit.
5. Bad connection between
headlamp switch and BCM
6. Loose relay.
7. Faulty Body Control Module.
LAMPS/LIGHTING - EXTERIOR 8L - 11
CORRECTION
1. Clean and secure battery cable clamps
and posts.
2. Adjust or replace generator drive belt.
3. Test and repair charging system, refer
to Electrical, Battery.
4. Test battery state-of-charge, refer to
Electrical, Battery.
5. Load test battery, refer to Electrical,
Battery.
6. Test for voltage drop across Z1 ground
locations, refer to Wiring Diagrams.
7. Replace both fog lamp bulbs.
1. Test and repair charging system, refer
to Electrical, Battery.
2. Inspect and repair all connectors and
splices, refer to Wiring Diagrams.
1. Test and repair charging system, refer
to Electrical, Battery.
2. Test for voltage drop across Z1 ground
locations, refer to Wiring Diagrams.
3. Test amperage draw of fog lamp circuit.
4. Replace both fog lamp bulbs.
1. Test for voltage drop across Z1-ground
locations, refer to Wiring Diagrams.
2. Test amperage draw of fog lamp circuit.
3. Replace headlamp switch.
4. Inspect and repair all connectors and
splices, refer to Wiring Diagrams.
5. Test and diagnose circuit between
headlamp switch and BCM.
6. Inspect and reset fog lamp relay.
7. Replace Body Control Module.