Exterior Lighting - Chrysler 300M 2002 Service Manual

EXTERIOR LIGHTING

Symptom:
HEADLAMP SWITCH INPUT FAILURE
When Monitored and Set Condition:
HEADLAMP SWITCH INPUT FAILURE
When Monitored: Ignition in run position.
Set Condition: The BCM detects excessive current on the fog lamp relay control circuit.
HEADLAMP SWITCH RETURN WIRE
HEADLAMP SWITCH MUX WIRE SHORT TO BATTERY
HEADLAMP MUX WIRE
HEADLAMP SWITCH
HEADLAMP SWITCH
HEADLAMP SWITCH MUX WIRE SHORTED TO GROUND
BODY CONTROL MODULE
TEST
1 Ensure the headlamp switch is in the OFF position.
With the DRBIII read the Headlamp Switch Voltage.
Does the DRBIII display Headlamp Switch Voltage: above 4.8 volts?
Yes → Go To 2
→ Go To 7
No
2 Turn the ignition off.
Disconnect the Headlamp Switch connector.
Turn the ignition on.
Measure the voltage between the Headlamp Switch Mux circuit and ground.
Is the voltage above 5.3 volts?
Yes → Go To 3
→ Go To 5
No
3 Turn the ignition off.
Disconnect the Headlamp Switch connector.
Disconnect the Body Control Module C2 connector.
Measure the Headlamp Switch Return circuit from the Body Control Module C2
connector to the headlamp switch connector.
Is the resistance below 5.0 ohms?
Yes → Go To 4
→ Repair the open Headlamp Switch Return circuit.
No
POSSIBLE CAUSES
ACTION
Perform BODY VERIFICATION TEST - VER 1.
218
APPLICABILITY
All
All
All