Chrysler 1998 Voyager Service Manual page 455

NS
DIAGNOSIS AND TESTING (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
HEADLAMPS DO NOT
ILLUMINATE
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. Low beam headlamp / foglamp fuse
blown.
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. Low beam headlamp / fog lamp
fuse blown.
1. Poor lighting circuit Z1-ground.
2. High resistance in headlamp circuit.
3. Loose or corroded terminals or
splices in circuit.
1. No voltage to headlamps.
2. No Z1-ground at headlamps.
3. Faulty headlamp switch.
4. Faulty headlamp dimmer (multi-
function) switch.
5. Broken connector terminal or wire
splice in headlamp circuit.
6. Defective or burned out bulb.
7. Body controller 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
Group 8A.
4. Test battery state-of -charge. Refer to
Group 8A.
5. Load test battery. Refer to Group 8A.
6. Test for voltage drop across Z1-ground
locations. Refer to Group 8W.
7. Locate cause of blown fuse and repair.
1. Test and repair charging system. Refer to
Group 8A.
2. Inspect and repair all connectors and
splices. Refer to Group 8W.
1. Test and repair charging system. Refer to
Group 8A.
2. Test for voltage drop across Z1-ground
locations. Refer to Group 8W.
3. Test amperage draw of headlamp circuit.
4. Locate cause of blown fuse and repair.
1. Test for voltage drop across Z1-ground
locations, refer to Group 8W.
2. Test amperage draw of headlamp circuit.
3. Inspect and repair all connectors and
splices. Refer to Group 8W.
1. Repair open headlamp circuit. Refer to
Group 8W.
2. Repair circuit ground. Refer to Group 8W.
3. Replace headlamp switch.
4. Replace multi-function switch.
5. Repair connector terminal or wire splice.
6. Replace bulb.
7. Refer to appropriate body controller
diagnostics.
LAMPS 8L - 3