Dodge Ram Truck 1500-2500-3500. Manual — part 593
FCM-WASHER PUMP OUTPUT CIRCUIT OPEN (CONTINUED)
5.
POWER DISTRIBUTION CENTER
Turn the ignition off.
Disconnect the FCM from the IPM.
Disconnect the IPM C3 harness connector.
Measure the internal resistance of the IPM Washer Pump Motor Control circuit.
Is the resistance above 5.0 ohms?
Yes
>> Replace the Power Distribution Center (PDC) in accordance with the Service Information.
Perform BODY VERIFICATION TEST - VER 1.
No
>> Replace the Front Control Module (FCM) in accordance with the Service Information.
Perform BODY VERIFICATION TEST - VER 1.
8R - 12
WIPERS/WASHERS - ELECTRICAL DIAGNOSTICS
DR/DH
FCM-WIPER ON-OFF RELAY OUTPUT CIRCUIT HIGH
DR/DH
WIPERS/WASHERS - ELECTRICAL DIAGNOSTICS
8R - 13
FCM-WIPER ON-OFF RELAY OUTPUT CIRCUIT HIGH (CONTINUED)
For the Wiper Washer system circuit diagram (Refer to 8 - ELECTRICAL/WIPERS/WASHERS - SCHEMATICS AND
DIAGRAMS).
For a complete wiring diagram Refer to Section 8W.
•
When Monitored:
•
Set Condition:
Possible Causes
WIPER ON/OFF RELAY
FRONT CONTROL MODULE
POWER DISTRIBUTION CENTER
1.
INTERMITTENT CONDITION
Turn the ignition on.
With the DRBIII
T
, clear all FCM DTC’s.
Turn the Wipers ON than OFF.
With the DRBIII
T
, read the DTC information.
Does the DRBIII
T
read: Wiper ON-OFF Relay
Output 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 BODY VERIFICATION TEST -
VER 1.
8R - 14
WIPERS/WASHERS - ELECTRICAL DIAGNOSTICS
DR/DH
FCM-WIPER ON-OFF RELAY OUTPUT CIRCUIT HIGH (CONTINUED)
2.
WIPER ON/OFF RELAY
Turn the ignition off.
Remove the Wiper On/Off Relay from the IPM.
Turn the ignition on.
Activate the Wiper Switch to all speed positions.
With the DRBIII
T
, read DTCs.
Does the DRBIII
T
display: Wiper On/Off Relay Output Circuit
High?
Yes
>> Replace the Wiper On/Off Relay in accordance with the
Service Information.
Perform BODY VERIFICATION TEST - VER 1.
No
>> Go To 3
3.
POWER DISTRIBUTION CENTER
Turn the ignition off.
Remove the Wiper On/Off Relay from the IPM.
Remove the FCM from the IPM.
Measure the voltage between the Wiper On/Off Relay Control circuit
and ground in the IPM.
Is there any voltage present?
Yes
>> Replace the Power Distribution Center (PDC) in accor-
dance with the Service Information.
Perform BODY VERIFICATION TEST - VER 1.
No
>> Replace the Front Control Module (FCM) in accordance
with the Service Information.
Perform BODY VERIFICATION TEST - VER 1.
DR/DH
WIPERS/WASHERS - ELECTRICAL DIAGNOSTICS
8R - 15
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