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System Tests: Notes

CAUTION: Before replacing any control module, ensure all module ground and power circuits are functioning properly. For circuit identification, see GROUND DISTRIBUTION and POWER DISTRIBUTION articles in WIRING DIAGRAMS.
SYMPTOM INDEX

Symptom Perform System Test
Rear Window Defogger Does Not Operate (DTC B1343) A 
Rear Window Defogger Does Not Turn Off Automatically B 
No Communication With Generic Electronic Module C 
No Communication With Instrument Cluster Module D 
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