RAM 3500 Truck 4WD V8-5.7L VIN D (2003)
Test 4
SYMPTOM
A/C-HEATER CONTROL ILLUMINATION INOPERATIVE
POSSIBLE CAUSES
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Check for instrument cluster (MIC) DTCs
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Inoperative bulb(s)
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A/C-Heater control module
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Panel lamps driver circuit open
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Instrument cluster
All Gauges Inoperative
Test 1 - 3