Dodge ZB 2005 - Electrically Heated Systems; Defog Relay Control Ckt Shorted to Batt

Symptom:
DEFOG RELAY CONTROL CKT SHORTED TO BATT
When Monitored and Set Condition:
DEFOG RELAY CONTROL CKT SHORTED TO BATT
When Monitored: With the ignition on and the EBL switch depressed.
Set Condition: This DTC will set when the A/C Heater Control Module senses excessive
current draw on the Rear Window Defogger Relay Control Circuit.
POSSIBLE CAUSES
CHECK FOR HVAC DTC’S
REAR WINDOW DEFOGGER RELAY SHORTED TO BATTERY
REAR WINDOW DEFOGGER RELAY CONTROL CKT SHORTED TO BATTERY
A/C HEATER CONTROL MODULE
TEST ACTION APPLICABILITY
1 Turn the ignition on.
With the DRBIIIt, record and erase DTC’s.
Depress the EBL switch on the A/C Heater Control Module.
With the DRBIIIt, read the active DTC’s.
Does the DRBIIIt display DEFOG RELAY CONTROL CKT SHORTED TO BATT?
All
Yes → Go To 2
No → Using the wiring diagram/schematic as a guide, inspect the
wiring and connectors. Refer to any Hotline letters or Technical
Service Bulletins that may apply.
Perform BODY VERIFICATION TEST - VER 1.
2 Turn the ignition on.
With the DRBIIIt, record and erase DTC’s.
Turn the ignition off.
Remove and install a known good relay in place of the Rear Window Defogger Relay.
Turn the ignition on.
Depress the EBL Switch on the A/C Heater Control Module.
With the DRBIIIt, read the active DTC’s.
Does the DRBIIIt display DEFOG RELAY CONTROL CKT SHORTED TO BATT?
All
Yes → Go To 3
No → Replace the Rear Window Defogger Relay in accordance with the
Service Information.
Perform BODY VERIFICATION TEST - VER 1.
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ELECTRICALLY HEATED SYSTEMS