Chrysler 300/300 Touring/300C, Dodge Magnum. Manual — part 503
•
When Monitored:
•
With the Fog Lamps activated.
•
Set Condition:
•
When the FCM detects a LOW condition.
Possible Causes
(L89) FOG LAMP CONTROL CIRCUIT
FRONT CONTROL MODULE
Diagnostic Test
1.
INTERMITTENT CONDITION
Turn the ignition on.
With the Scan Tool, clear all FCM DTC’s.
Turn the Fog Lamps on.
With the Scan Tool read the DTC information.
Does the Scan Tool read: B1659-FRONT FOG LAMP CONTROL 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-VER1.
2.
(L89) FOG LAMP CONTROL CIRCUIT
Turn the ignition off.
Disconnect the FCM PDM harness connector.
Measure the resistance between ground and the (L89) Fog Lamp Con-
trol circuit.
Is the resistance below 5.0 ohms?
Yes
>> Replace the Front Control Module (FCM) in accordance
with the service information.
Perform the BODY VERIFICATION TEST VER1.
No
>> Repair the (L89) Fog Lamp Control circuit for a short to
ground condition.
Perform the BODY VERIFICATION TEST VER1.
8L - 42
LAMPS/LIGHTING - EXTERIOR - ELECTRICAL DIAGNOSTICS
LX
B1660-FRONT FOG LAMP CONTROL CIRCUIT HIGH
For a complete wiring diagram Refer to Section 8W.
LX
LAMPS/LIGHTING - EXTERIOR - ELECTRICAL DIAGNOSTICS
8L - 43
•
When Monitored:
•
With the Front Fog Lamps activated.
•
Set Condition:
•
When the FCM detects a HIGH condition.
Possible Causes
FRONT FOG LAMP RELAY
MODULE-POWER DISTRIBUTION
FRONT CONTROL MODULE
Diagnostic Test
1.
INTERMITTENT CONDITION
Turn the ignition on.
With the Scan Tool, clear all FCM DTC’s.
Actuate the Front Fog Lamps.
With the Scan Tool read the DTC information.
Does the Scan Tool read: B1660-FRONT FOG LAMP CONTROL CIRCUIT HIGH?
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-VER1.
2.
FRONT FOG LAMP RELAY
Turn the ignition off.
Remove and install a known good relay in place of the Front Fog Lamp Relay.
Do the Front Fog Lamps operate normally?
Yes
>> Replace the Front Fog Lamp Relay in accordance with the service information.
Perform the BODY VERIFICATION TEST VER1.
No
>> Go To 3
3.
FRONT CONTROL MODULE
Turn the ignition off.
Remove the Front Fog Lamp Relay from the MPD.
Remove the FCM from the Module Power Distribution.
Measure the voltage of the (L89) Front Fog Lamp Relay Output circuit
and ground.
Is the voltage above 1.0 volts?
Yes
>> Replace the Module Power Distribution center in accor-
dance with the service information.
Perform the BODY VERIFICATION TEST-VER1.
No
>> Replace the Module Front Control in accordance with the
service information.
Perform the BODY VERIFICATION TEST-VER1.
8L - 44
LAMPS/LIGHTING - EXTERIOR - ELECTRICAL DIAGNOSTICS
LX
B1661-FRONT FOG LAMP CONTROL CIRCUIT OPEN
For a complete wiring diagram Refer to Section 8W.
LX
LAMPS/LIGHTING - EXTERIOR - ELECTRICAL DIAGNOSTICS
8L - 45
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