Chrysler 300/300 Touring/300C, Dodge Magnum. Manual — part 507
3.
FRONT CONTROL MODULE
Turn the ignition off.
Disconnect the Front Control Module from the PDM 49 way connector.
Measure the voltage between (L1) Backup Lamps Control circuit and ground.
Is there any voltage present?
Yes
>> Replace the Power Distribution Center.
Perform BODY VERIFICATION TEST - VER 1.
No
>> Replace the Front Control Module.
Perform BODY VERIFICATION TEST - VER 1.
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LAMPS/LIGHTING - EXTERIOR - ELECTRICAL DIAGNOSTICS
LX
B1607-HEADLAMP SWITCH INPUT CIRCUIT LOW
For a complete wiring diagram Refer to Section 8W.
LX
LAMPS/LIGHTING - EXTERIOR - ELECTRICAL DIAGNOSTICS
8L - 59
Possible Causes
HEADLAMP SWITCH
(L900) MUX RETURN CIRCUIT
INSTRUMENT CLUSTER
Diagnostic Test
1.
INTERMITTENT CONDITION
Turn the ignition on.
With the Scan Tool, clear all CCN DTC’s.
Turn the Headlamps on.
With the Scan Tool, read the DTC information.
Does the Scan Tool read: B1607-HEADLAMP SWITCH INPUT CIRCUIT LOW?
Yes
>> Go To 2
No
>> The condition that caused the symptom is currently not present. Inspect the related wiring for a possible
intermittent condition. Look for any chafed, pierced, pinched, or partially broken wires.
Perform the BODY VERIFICATION TEST — VER 1.
2.
HEADLAMP SWITCH
Disconnect the Headlamp Switch connector.
Turn the ignition on.
Measure the voltage of the (L900) MUX Return circuit.
Does the voltage read 5.0 volts?
Yes
>> Go To 3
Perform the BODY VERIFICATION TEST — VER 1.
No
>> Replace the Headlamp Switch in accordance with the service information.
Perform the BODY VERIFICATION TEST — VER 1.
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LAMPS/LIGHTING - EXTERIOR - ELECTRICAL DIAGNOSTICS
LX
3.
(L900) MUX RETURN CIRCUIT
Turn the ignition off.
Disconnect the Headlamp Switch connector.
Disconnect the Instrument Cluster C2 connector.
Measure the resistance of the (L900) MUX Return circuit to ground.
Is the resistance below 5.0 ohms?
Yes
>> Repair the (L900) Headlamp MUX return circuit.
Perform the BODY VERIFICATION TEST — VER 1.
No
>> Replace the Instrument Cluster in accordance with the ser-
vice information.
Perform the BODY VERIFICATION TEST — VER 1.
LX
LAMPS/LIGHTING - EXTERIOR - ELECTRICAL DIAGNOSTICS
8L - 61
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