Dodge Ram Truck 1500-2500-3500. Manual — part 415
FCM-REAR LEFT TURN OUTPUT CIRCUIT LOW (CONTINUED)
2.
REAR LEFT 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 Left Turn Lamp
Driver circuit.
Is the resistance below 5.0 ohms?
Yes
>> Go To 3
No
>> Repair the Rear Left 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 Left 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 - 66
LAMPS/LIGHTING - EXTERIOR - ELECTRICAL DIAGNOSTICS
DR/DH
FCM-REAR LEFT TURN OUTPUT CIRCUIT OPEN
DR/DH
LAMPS/LIGHTING - EXTERIOR - ELECTRICAL DIAGNOSTICS
8L - 67
FCM-REAR LEFT TURN OUTPUT CIRCUIT OPEN (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 detects an open condition
Possible Causes
REAR LEFT TURN SIGNAL OUTPUT CIRCUIT OPEN
POWER DISTRIBUTION CENTER
FRONT CONTROL MODULE
1.
INTERMITTENT CONDITION
Turn the ignition on.
With the DRBIII
T
, clear all FCM DTC’s.
Actuate the Left Rear Turn Signal lamp.
With the DRBIII
T
, read the DTC information.
Does the DRBIII
T
read: Rear Left Turn Output
Circuit Open?
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.
8L - 68
LAMPS/LIGHTING - EXTERIOR - ELECTRICAL DIAGNOSTICS
DR/DH
FCM-REAR LEFT TURN OUTPUT CIRCUIT OPEN (CONTINUED)
2.
REAR LEFT TURN SIGNAL OUTPUT CIRCUIT OPEN
Turn the ignition off.
Disconnect the IPM C3 harness connector
Measure the resistance of the Rear Left Turn Signal Output circuit.
Is the resistance above 5.0 ohms?
Yes
>> Repair the Rear Left Turn Signal Output circuit for an
open.
Perform BODY VERIFICATION TEST - VER 1.
No
>> Go To 3
3.
FRONT CONTROL MODULE
Turn the ignition off
Disconnect the FCM harness connector.
Disconnect the IPM C3 harness connector.
Measure the resistance between ground and the Rear Left Turn Signal Output circuit.
Is the resistance above 5.0 ohms?
Yes
>> Replace the Power Distribution Center..
Perform BODY VERIFICATION TEST - VER 1.
No
>> Replace the Front Control Module.
Perform BODY VERIFICATION TEST - VER 1.
DR/DH
LAMPS/LIGHTING - EXTERIOR - ELECTRICAL DIAGNOSTICS
8L - 69
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