Chrysler 300M Service Manual page 348

LH
HEADLAMP (Continued)
CONDITION
HEADLAMPS ARE DIM
WITH ENGINE IDLING OR
IGNITION TURNED OFF
HEADLAMP BULBS BURN
OUT FREQUENTLY
HEADLAMPS ARE DIM
WITH ENGINE RUNNING
ABOVE IDLE
HEADLAMPS FLASH
RANDOMLY
HEADLAMP 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 headlamp bulbs 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 headlamp
circuit.
4. Both headlamp bulbs defective.
1. Poor lighting circuit Z1-ground.
2. High resistance in headlamp
circuit.
3. Faulty headlamps switch circuit
breaker.
4. Loose or corroded terminals or
splices in circuit.
5. Loose relay
6. Faulty Body Control Module
LAMPS/LIGHTING - EXTERIOR 8L - 19
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 headlamp 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 headlamp
circuit.
4. Replace both headlamp bulbs.
1. Test for voltage drop across Z1-ground
locations, refer to Wiring Diagrams.
2. Test amperage draw of headlamp
circuit.
3. Replace headlamp switch.
4. Inspect and repair all connectors and
splices, refer to Wiring Diagrams.
5. Inspect and reset headlamp and
parking lamp relays.
6. Replace Body Control Module