Dodge RAM TRUCK 1500 1995 Service Manual page 485

8L - 2 LAMPS BR
HEADLAMP DIAGNOSIS
CONDITION
POSSIBLE
C A U S E S CORRECTION
HEADLAMPS ARE DIM
WITH ENGINE
IDLING
OR IGNITION TURNED
OFF.
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. 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. Replace both headlamp bulbs.
HEADLAMP
BULBS
BURN OUT
FREQUENTLY.
1. Charging system output
too high.
2. Loose or corroded terminals or
splices in circuit.
1. Test and repair charging system, refer to Group 8A.
2. Inspect and repair all connectors and splices, refer to
Group 8W.
HEADLAMPS
ARE DIM WITH ENGINE
RUNNING ABOVE IDLE.*
1. Charging system output
too low.
2. Poor headlamp circuit
ground.
3. High resistance in headlamp ,
circuit.
4. Both headlamp bulbs
defective.
1. Test and repair charging system, refer to Group 8A.
2. Test voltage drop across Z1-ground, refer to Group 8W.
3. Test amperage draw of headlamp circuit.
4. Replace both headlamp bulbs.
HEADLAMPS
FLASH RANDOMLY.
1. Poor headlamp circuit
ground.
2. High resistance in headlamp
circuit.
3. Faulty headlamp switch
circuit breaker.
4. Loose or corroded terminals
or splices in circuit.
1 . Repair circuit ground, refer to Group 8W.
2. Test amperage draw of headlamp circuit. '
3. Replace headlamp switch.
4. Repair connector terminals or splices, refer to Group 8W.
HEADLAMPS
DO NOT ILLUMINATE.
1. No voltage to headlamps.
2. No ground at headlamps.
3. Faulty headlamp switch.
4. Faulty headlamp dimmer
switch.
5. Broken connector terminal or
wire splice in headlamp circui.
1. Replace fuse, refer to group 8W.
2. Repair circuit ground, refer to Group 8W.
3. Replace headlamp switch.
4. Replace headlamp dimmer switch.
5. Repair connector terminal or wire splices.
* Canada vehicles must have lamps ON,
J958L-5