Chrysler 300M 2002 Service Manual page 351

8L - 16 LAMPS/LIGHTING - EXTERIOR
HEADLAMP (Continued)
CONDITION
HEADLAMPS ARE DIM
WITH ENGINE RUNNING
ABOVE IDLE
HEADLAMPS FLASH
RANDOMLY
HEADLAMPS DO NOT
ILLUMINATE
HEADLAMPS ILLUMINATE
CONTINUOUSLY WITH
IGNITION ON
POSSIBLE CAUSES
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
1. No voltage to headlamps.
2. No Z1-ground at headlamps.
3. Faulty headlamp switch.
4. Faulty dimmer switch.
5. Broken connection between BCM
and headlamp/parking lamp relay.
6. Faulty parking lamp/headlamp
relay.
7. Faulty Body Control Module
1. Check headlamp switch circuit
G52 for continuity. If no continuity.
2. Check headlamp switch return
circuit L80 for continuity. If no
continuity. (BCM will automatically do
this if no continuity is detected.)
3. Check circuit L43 left side and L44
right side for a short to battery
between the headlamp switch and
the headlamp relay.
4. Stuck relay.
5. Faulty Body Control Module
CORRECTION
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
1. Repair open headlamp circuit, refer to
Wiring Diagrams.
2. Repair circuit ground, refer to Wiring
Diagrams.
3. Replace headlamp switch.
4. Replace headlamp switch.
5. Check Junction Block. continuity.
Service as necessary.
6. Replace relay.
7. Replace Body Control Module
1. Repair circuit.
2. Repair circuit.
3. Repair circuit.
4. Replace relay.
5. Replace Body Control Module
LH