Chrysler New Yorker. Manual - part 86
DIAGNOSIS AND TESTING
HEADLAMP AND FOG LAMP DIAGNOSIS
When a vehicle experiences problems with the
headlamp system, verify the condition of:
• Battery connections
• Charging system
• Headlamp bulbs
• Head lamp relay
• High beam dimmer switch
• Headlamp switch
• Body Control Module
• Wire connectors
Refer to Group 8W, Wiring Diagrams, for compo-
nent locations and circuit information.
ELECTRONIC DAYTIME RUNNING LIGHT
LH vehicles built for use in Canada are equipped
with a Daytime Running Lamp (DRL) system. The
DRL system operates the headlamp high beams at
reduced power with the headlamp high beam and low
beam switch OFF and the ignition switch in the run
position. In addition, the park brake must be disen-
gaged and the brake fluid level switch must be open
for the headlamps to operate in the DRL mode. The-
DRL system is controlled by the Daytime Running
Lamp Module attached to the Junction Block on the
left side of the instrument panel. The DRL module
overrides the headlamp switch when the headlamps
are turned OFF. The headlamps operate normally
when the headlamps are turned ON.
DAYTIME RUNNING LAMP MODULE
The Daytime Lamp Module is controlled by inputs
received from the Parking Brake, Brake Fluid Level
Switch, High Beam Headlamp Relay and Low Beam
Headlamp. Refer to Group 8W, Wiring Diagrams, for
location and circuit information.
HEADLAMP SWITCH
The headlamp switch is located on the upper left
side of the instrument panel. Refer to Group 8E,
Instrument Panel and Systems, for proper service
procedures.
HIGH-BEAM HEADLAMP SWITCH
The high beam headlamp switch is part of the
multi-function switch located on the steering column.
Refer to Group 8J, Turn Signals and Warning Flash-
ers, for proper service procedures.
HEADLAMP DIAGNOSIS
CONDITION
POSSIBLE CAUSES
CORRECTION
HEADLAMPS ARE DIM
WITH ENGINE IDLING
OR IGNITION
TURNED OFF
1. Loose or corroded battery cables.
1. Clean and secure battery cable clamps and
posts.
2. Loose or worn generator drive
belt.
2. Adjust or replace generator drive belt.
3. Charging system output too low.
3. Test and repair charging system, refer to
Group 8A, Battery
4. Battery has insufficient charge.
4. Test battery state-of-charge, refer to Group
8A, Battery.
5. Battery is sulfated or shorted.
5. Load test battery, refer to Group 8A, Battery.
6. Poor lighting circuit Z1 ground.
6. Test for voltage drop across Z1 ground
locations, refer to Group 8W, Wiring Diagrams.
7. Both headlamp bulbs defective.
7. Replace both headlamp bulbs.
HEADLAMP BULBS
BURN OUT
FREQUENTLY
1. Charging system output too high.
1. Test and repair charging system, refer to
Group 8A, Battery.
2. Loose or corroded terminals or
splices in circuit.
2. Inspect and repair all connectors and
splices, refer to Group 8W, Wiring Diagrams.
8L - 2
LAMPS
300M