Dodge Durango (HB). Manual — part 335
B1670-RIGHT TRAILER TOW LAMP CONTROL CIRCUIT HIGH
HB
LAMPS/LIGHTING - EXTERIOR - ELECTRICAL DIAGNOSTICS
8L - 59
B1670-RIGHT TRAILER TOW LAMP CONTROL CIRCUIT HIGH (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 HIGH condition.
Possible Causes
RIGHT TRAILER TOW RELAY
MODULE-POWER DISTRIBUTION
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.
Actuate the Trailer Tow Lamps.
With the Scan Tool read the DTC information.
Does the Scan Tool read: B1670-RIGHT TRAILER TOW 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.
TRAILER TOW RELAY
Turn the ignition off.
Remove and install a known good relay in place of the Right Trailer Tow Relay.
Do the Trailer Tow Lamps operate normally?
Yes
>> Replace the Right Trailer Tow Relay in accordance with the service information.
Perform the BODY VERIFICATION TEST VER1.
No
>> Go To 3
8L - 60
LAMPS/LIGHTING - EXTERIOR - ELECTRICAL DIAGNOSTICS
HB
B1670-RIGHT TRAILER TOW LAMP CONTROL CIRCUIT HIGH (CONTINUED)
3.
FRONT CONTROL MODULE
Turn the ignition off.
Remove the Right Trailer Tow Relay from the MPD.
Remove the FCM from the Module Power Distribution.
Measure the voltage of the (L656) Right Trailer Tow Relay Output cir-
cuit 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.
HB
LAMPS/LIGHTING - EXTERIOR - ELECTRICAL DIAGNOSTICS
8L - 61
B160D-TURN/HAZARD SWITCH INPUT CIRCUIT LOW
8L - 62
LAMPS/LIGHTING - EXTERIOR - ELECTRICAL DIAGNOSTICS
HB
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