Chrysler Dodge Caravan 2002 Manual page 514

RS
HEADLAMP (Continued)
CONDITION
HEADLAMPS ARE DIM
WITH ENGINE
RUNNING ABOVE IDLE.
HEADLAMPS FLASH
RANDOMLY
HEADLAMPS DO NOT
ILLUMINATE.
HEADLAMPS ON WITH
IGNITION IN RUN, WITH
HEADLAMP SWITCH
OFF.
POSSIBLE CAUSES
1. Charging system output too low.
2. Poor lighting circuit Z343/Z344-
ground.
3. High resistance in headlamp
circuit.
1. Poor lighting circuit Z343/Z344-
ground.
2. Variable resistance in headlamp
circuit.
3. Loose or corroded terminals or
splices in circuit.
4. Faulty headlamp switch.
1. No voltage to headlamps.
2. No Z343/Z344-ground at
headlamps.
3. Broken connector terminal or
wire splice in headlamp circuit.
4. Faulty or burned out bulb.
5. Body Control Module
malfunction.
6. PCI Bus Communication
7. IPM/FCM Malfunction.
1. Faulty headlamp switch.
2. Diagnostic tool indicates (4.7 -
5.0V) on headlamp switch input to
BCM.
3. PCI Bus Communication.
LAMPS/LIGHTING - EXTERIOR
CORRECTION
1. Test and repair charging system, refer to
Electrical, Wiring Information.
2. Test for voltage drop across Z343/Z344-
ground locations, refer to Electrical, Wiring
Information.
3. Test amperage draw of headlamp circuit.
1. Test for voltage drop across Z343/Z344-
ground locations, refer to Electrical, Wiring
Information.
2. Test amperage draw of headlamp circuit.
3. Inspect and repair all connectors and splices,
refer to Electrical, Wiring Information.
4. Replace headlamp switch.
1. Repair open headlamp circuit, refer to
Electrical, Wiring Information.
2. Repair circuit ground, refer to Electrical,
Wiring Information.
3. Repair connector terminal or wire splice.
4. Replace headlamp bulb(s).
5. Refer to appropriate Body Control Module
diagnostics.
6. Verify messages being transmitted by BCM
and received by FCM.
7. Refer to appropriate IPM/FCM diagnostics.
1. Replace headlamp switch (review BCM
logged faults).
2. Inspect and repair terminals, connectors and
open circuits.
3. Verify messages being transmitted by BCM
and received by FCM.
8L - 13