Dodge Ram. Manual — part 84
Symptom:
FCM-LEFT HIGHBEAM OUTPUT CIRCUIT OPEN
POSSIBLE CAUSES
INTERMITTENT CONDITION
LEFT HIGHBEAM OUTPUT CIRCUIT OPEN
FRONT CONTROL MODULE
POWER DISTRIBUTION CENTER
TEST
ACTION
APPLICABILITY
1
Turn the ignition on.
With the DRBIII
t, clear all FCM DTC’s.
Turn the Highbeam Lamps on.
With the DRBIII
t, read the DTC information.
Does the DRBIII
t read: Left Highbeam Output Circuit Open?
All
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.
2
Turn the ignition off.
Disconnect the IPM C7 harness connector
Measure the resistance of the Left Highbeam Output circuit.
Is the resistance above 5.0 ohms?
All
Yes
→ Repair the Left Highbeam Output circuit for an open.
Perform BODY VERIFICATION TEST - VER 1.
No
→ Go To 3
3
Turn the ignition off
Disconnect the FCM from the IPM.
Disconnect the IPM C7 harness connector.
Measure the resistance of the Left Highbeam Output circuit.
Is the resistance above 5.0 ohms?
All
Yes
→ Replace the Power Distribution Center..
Perform BODY VERIFICATION TEST - VER 1.
No
→ Replace the Front Control Module.
Perform BODY VERIFICATION TEST - VER 1.
333
EXTERIOR LIGHTING
Symptom:
FCM-LEFT LOWBEAM OUTPUT CIRCUIT LOW
POSSIBLE CAUSES
INTERMITTENT CONDITION
LEFT LOWBEAM OUTPUT CIRCUIT SHORT TO GROUND
FRONT CONTROL MODULE
POWER DISTRIBUTION CENTER
TEST
ACTION
APPLICABILITY
1
Turn the ignition on.
With the DRBIII
t, clear all FCM DTC’s.
Turn the Lowbeam Lamps on.
With the DRBIII
t, read the DTC information.
Does the DRBIII
t read: Left Lowbeam Output Circuit Low?
All
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.
2
Turn the ignition off.
Disconnect the IPM C7 harness connector.
Measure the resistance between ground and the Left Lowbeam Output circuit.
Is the resistance below 5.0 ohms?
All
Yes
→ Go To 3
No
→ Repair the Left Lowbeam Output circuit for a short to ground.
Perform BODY VERIFICATION TEST - VER 1.
3
Turn the ignition off
Disconnect the FCM connector.
Disconnect the IPM C7 harness connector.
Measure the resistance between ground and the Left Lowbeam Output circuit in the
IPM.
Is the resistance below 5.0 ohms?
All
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.
334
EXTERIOR LIGHTING
Symptom:
FCM-LEFT LOWBEAM OUTPUT CIRCUIT OPEN
POSSIBLE CAUSES
INTERMITTENT CONDITION
LEFT LOWBEAM OUTPUT CIRCUIT OPEN
FRONT CONTROL MODULE
POWER DISTRIBUTION CENTER
TEST
ACTION
APPLICABILITY
1
Turn the ignition on.
With the DRBIII
t, clear all FCM DTC’s.
Turn the Lowbeam Lamps on.
With the DRBIII
t, read the DTC information.
Does the DRBIII
t read: Left Lowbeam Output Circuit Open?
All
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.
2
Turn the ignition off.
Disconnect the IPM C7 harness connector
Measure the resistance of the Left Lowbeam Output circuit.
Is the resistance above 5.0 ohms?
All
Yes
→ Repair the Left Lowbeam Output circuit for an open.
Perform BODY VERIFICATION TEST - VER 1.
No
→ Go To 3
3
Turn the ignition off
Disconnect the FCM from the IPM.
Disconnect the IPM C7 harness connector.
Measure the resistance of the Left Lowbeam Output circuit.
Is the resistance above 5.0 ohms?
All
Yes
→ Replace the Power Distribution Center..
Perform BODY VERIFICATION TEST - VER 1.
No
→ Replace the Front Control Module.
Perform BODY VERIFICATION TEST - VER 1.
335
EXTERIOR LIGHTING
Symptom:
FCM-LEFT STOP LAMP OUTPUT CIRCUIT LOW
POSSIBLE CAUSES
INTERMITTENT CONDITION
LEFT BRAKE LAMP FEED CIRCUIT SHORT TO GROUND
FRONT CONTROL MODULE
POWER DISTRIBUTION CENTER
TEST
ACTION
APPLICABILITY
1
Turn the ignition on.
With the DRBIII
t, clear all FCM DTC’s.
Actuate the Stop Lamps.
With the DRBIII
t, read the DTC information.
Does the DRBIII
t read: Left Stop Lamp Output Circuit Low?
All
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.
2
Turn the ignition off.
Disconnect the IPM C3 harness connector.
Measure the resistance between ground and the Left Brake Lamp Feed circuit.
Is the resistance below 5.0 ohms?
All
Yes
→ Go To 3
No
→ Repair the Left Brake Lamp Feed circuit for a short to ground.
Perform BODY VERIFICATION TEST - VER 1.
3
Turn the ignition off
Disconnect the FCM connector.
Disconnect the IPM C3 harness connector.
Measure the resistance between ground and the Left Brake Lamp Feed circuit in the
IPM.
Is the resistance below 5.0 ohms?
All
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.
336
EXTERIOR LIGHTING
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