Dodge dakota 2002 Service Manual page 541

8L - 4 LAMPS/LIGHTING - EXTERIOR
LAMPS/LIGHTING - EXTERIOR (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 ground.
1. Integrated Control Module (ICM)
not controlling voltage.
2. Loose or corroded terminals or
splices in circuit.
1. Charging system output too low.
2. Poor lighting circuit ground.
3. High resistance in headlamp
circuit.
1. Poor lighting circuit ground.
2. Variable resistance in headlamp
circuit.
3. Loose or corroded terminals or
splices in circuit.
4. Faulty headlamp switch.
5. Front Control Module
Malfunction.
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, Charging
4. Test battery state-of-charge, refer to
Electrical, Battery System.
5. Load test battery, refer to Electrical, Battery
System.
6. Test for voltage drop across ground circuits,
refer to Electrical, Wiring Diagram Information.
1. Test and repair Integrated Control Module.
2. Inspect and repair all connectors and splices.
Refer to Electrical, Wiring Information.
1. Test and repair charging system, refer to
Electrical, Wiring Information.
2. Test for voltage drop across ground circuits,
refer to Electrical, Wiring Information.
3. Test amperage draw of headlamp circuit.
1. Test for voltage drop across 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.
5. Refer to appropriate ICM/FCM diagnostics.
DR