Dodge Dakota (ND). Manual — part 297
B165D-PARK LAMP CONTROL CIRCUIT HIGH (CONTINUED)
3.
FRONT CONTROL MODULE
Turn the ignition off.
Remove the Park Lamp Relay from the MPD.
Remove the FCM from the Module Power Distribution.
Measure the voltage of the (L779) Park 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 - 50
LAMPS/LIGHTING - EXTERIOR - ELECTRICAL DIAGNOSTICS
ND
B166B-LEFT TRAILER TOW LAMP CONTROL CIRCUIT LOW
ND
LAMPS/LIGHTING - EXTERIOR - ELECTRICAL DIAGNOSTICS
8L - 51
B166B-LEFT TRAILER TOW LAMP CONTROL 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 Trailer Tow Lamps activated.
•
Set Condition:
•
When the FCM detects a LOW condition.
Possible Causes
(L655) TRAILER TOW CONTROL CIRCUIT
FRONT CONTROL MODULE
Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding.
Diagnostic Test
1.
INTERMITTENT CONDITION
Turn the ignition on.
With the Scan Tool, clear all FCM DTC’s.
Turn the Trailer Tow Lamps on.
With the Scan Tool read the DTC information.
Does the Scan Tool read: B166B-LEFT TRAILER TOW 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 intermit-
tent condition. Look for any chafed, pierced, pinched, or
partially broken wires.
Perform the BODY VERIFICATION TEST-VER1.
2.
(L655) TRAILER TOW CONTROL CIRCUIT
Turn the ignition off.
Disconnect the FCM PDM harness connector.
Measure the resistance between ground and the (L655) Left Trailer
Tow Control 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 (L655) Left Trailer Tow Control circuit for a
short to ground condition.
Perform the BODY VERIFICATION TEST VER1.
8L - 52
LAMPS/LIGHTING - EXTERIOR - ELECTRICAL DIAGNOSTICS
ND
B166C-LEFT TRAILER TOW LAMP CONTROL CIRCUIT HIGH
ND
LAMPS/LIGHTING - EXTERIOR - ELECTRICAL DIAGNOSTICS
8L - 53
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