Dodge Ram Truck 1500-2500-3500. Manual — part 416
FCM-REAR RIGHT TURN OUTPUT CIRCUIT LOW
8L - 70
LAMPS/LIGHTING - EXTERIOR - ELECTRICAL DIAGNOSTICS
DR/DH
FCM-REAR RIGHT TURN OUTPUT CIRCUIT LOW (CONTINUED)
For the Exterior Lighting system circuit diagram (Refer to 8 - ELECTRICAL/LAMPS/LIGHTING - EXTERIOR -
SCHEMATICS AND DIAGRAMS).
For a complete wiring diagram Refer to Section 8W.
•
When Monitored:
With the ignition on
•
Set Condition:
The FCM detectsa short to ground condition
Possible Causes
REAR RIGHT TURN LAMP DRIVER CIRCUIT SHORT TO GROUND
POWER DISTRIBUTION CENTER
FRONT CONTROL MODULE
1.
INTERMITTENT CONDITION
Turn the ignition on.
With the DRBIII
T
, clear all FCM DTC’s.
Actuate the Right Rear Turn Signal lamp.
With the DRBIII
T
, read the DTC information.
Does the DRBIII
T
read: Rear Right Turn Output
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 BODY VERIFICATION TEST -
VER 1.
DR/DH
LAMPS/LIGHTING - EXTERIOR - ELECTRICAL DIAGNOSTICS
8L - 71
FCM-REAR RIGHT TURN OUTPUT CIRCUIT LOW (CONTINUED)
2.
REAR RIGHT TURN LAMP DRIVER CIRCUIT SHORT TO GROUND
Turn the ignition off.
Disconnect the IPM C3 harness connector.
Measure the resistance between ground and the Rear Right Turn
Lamp Driver circuit.
Is the resistance below 5.0 ohms?
Yes
>> Go To 3
No
>> Repair the Rear Right Turn Lamp Driver circuit for a short
to ground.
Perform BODY VERIFICATION TEST - VER 1.
3.
FRONT CONTROL MODULE
Turn the ignition off
Disconnect the FCM connector.
Disconnect the IPM C3 harness connector.
Measure the resistance between ground and the Rear Right Turn Lamp Driver circuit in the IPM.
Is the resistance below 5.0 ohms?
Yes
>> Replace the Power Distribution Center(PDC).
Perform BODY VERIFICATION TEST - VER 1.
No
>> Replace the Front Control Module.
Perform BODY VERIFICATION TEST - VER 1.
8L - 72
LAMPS/LIGHTING - EXTERIOR - ELECTRICAL DIAGNOSTICS
DR/DH
FCM-REAR RIGHT TURN OUTPUT CIRCUIT OPEN
DR/DH
LAMPS/LIGHTING - EXTERIOR - ELECTRICAL DIAGNOSTICS
8L - 73
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