Diagnostic Procedure
WARNING: This page is about a different car, the 2005 Dodge Stratus and 2005 Chrysler Sebring. However, it is still accessible from the selected car via links, so may be relevant.
DIAGNOSTIC PROCEDURES - REAR WINDOW DEFOGGER INOPERATIVE (EQUIPPED WITH AUTOMATIC TEMP CONTROL)
| TEST | ACTION | APPLICABILITY |
|---|---|---|
| 1 | With the DRBIII®, read the Automatic Temperature Control Module DTC's. Are there any related HVAC DTC's present? Yes --> Refer to the appropriate test for related DTC's. Perform BODY VERIFICATION TEST - VER 1 . No --> Go To 2 |
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| 2 | With the DRBIII® in ATC Inputs/Outputs, read the EBL sw state while toggling the Rear Defogger button. Does the EBL Switch state change when the switch is depressed? Yes --> Go To 3 No --> Replace the Automatic Temperature Control Head. Perform BODY VERIFICATION TEST - VER 1 . |
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| 3 | Turn the ignition on. Turn the Rear Window Defogger on. Using a 12 volt test light, check for voltage at the Rear Window Defogger Relay Output circuit at the defogger grid. Did the test light illuminate? Yes --> Repair the open in the Rear Window Defogger Grid or the Grid Ground circuit. Perform BODY VERIFICATION TEST - VER 1 . No --> Go To 4 |
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| 4 | With the DRBIII®, actuate the Rear Window Defogger Relay. Examine the Rear Window Defogger Relay. Does the Rear Window Defogger Relay click while actuating. Yes --> Go To 5 No --> Go To 8 |
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| 5 | Check the Power Distribution Center fuse 6. Is the fuse open. Yes --> Check for a short to ground and replace the PDC fuse. Perform BODY VERIFICATION TEST - VER 1 . No --> Go To 6 |
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| 6 | Remove the Rear Window Defogger Relay from the Junction Block. Measure the voltage of the Fused B(+) circuit in the Rear Window Defogger Relay connector. Is the voltage above 10.0 volts? Yes --> Go To 7 No --> Repair the open Fused B(+) circuit from PDC fuse #6. Perform BODY VERIFICATION TEST - VER 1 . |
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| 7 | Remove the Rear Window Defogger Relay from the Junction Block. Install a known good relay in the Rear Window Defogger Relay connector. Turn the ignition on. Turn the Rear Window Defogger on. Using a 12 volt test light, check for voltage at the Rear Window Defogger Relay Output circuit at the defogger grid. Did the test light illuminate? Yes --> Replace the original Rear Window Defogger Relay. Perform BODY VERIFICATION TEST - VER 1 . No --> Repair the Rear Window Defogger Relay Output circuit for an open. Perform BODY VERIFICATION TEST - VER 1 . |
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| 8 | Check Junction Block fuse 15. Is the fuse open. Yes --> Check for a short and replace the Junction Block fuse. Perform BODY VERIFICATION TEST - VER 1 . No --> Go To 9 |
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| 9 | Remove the Rear Window Defogger Relay from the Junction Block. Turn the ignition on. Measure the voltage of the Fused Ignition Switch circuit in the Rear Window Defogger Relay connector. Is the voltage above 10.0 volts? Yes --> Go To 10 No --> Repair the Fused Ignition Switch Output circuit from the ignition switch for an open. Perform BODY VERIFICATION TEST - VER 1 . |
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| 10 | Remove the Rear Window Defogger Relay from the Junction Block. Install a known good relay in the Rear Window Defogger Relay connector. Turn the ignition on. With the DRBIII®, actuate the Rear Window Defogger Relay. Examine the Rear Window Defogger Relay. Does the Rear Window Defogger Relay click while actuating. Yes --> Replace the original Rear Window Defogger Relay. Perform BODY VERIFICATION TEST - VER 1 . No --> Go To 11 |
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| 11 | Remove the BCM from the junction block. Reinstall the Rear Window Defogger Relay if removed. Turn the ignition on. Momentarily jumper the Rear Window Defogger Relay Control circuit (cavity 3) in the BCM internal connector to ground. Does the relay click? Yes --> Replace the Body Control Module. Perform BODY VERIFICATION TEST - VER 1 . No --> Replace the Junction Block. Perform BODY VERIFICATION TEST - VER 1 . |
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