RAM 1500 Van V8-5.2L CNG VIN T (1999)
SYMPTOM
* ONE GAUGE NOT OPERATING PROPERLY
POSSIBLE CAUSES
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Speedometer related DTC's present
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Oil gauge not reading > 4 psi at idle
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Pinion factor incorrect
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Oil level low
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Charging related DTC's present
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Instrument cluster circuit board defective
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Oil pressure sensor defective
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Instrument cluster defective
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Oil pressure sense circuit open
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Oil pressure sense signal circuit short to ground
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Cooling system operation faulty
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DRB not showing PCM active ON bus
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DRB shows ECT sensor voltage too high
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DRB shows ECT sensor voltage too low
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Fuel gauge defective
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Oil pressure switch defective
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Powertrain Control Module (JTEC) defective
Courtesy Lamps Inop From All Doors & Courtesy Lamp Switch
SYMPTOM
* COURTESY LAMPS INOPERATIVE FROM ALL DOORS & COURTESY LAMP SWITCH
POSSIBLE CAUSES
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No response (CTM) / CCD bus failure
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Courtesy lamp switch output circuit open
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Fused B (+) circuit open
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Headlamp switch defective - courtesy lamp defeat switch
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Courtesy lamp driver circuit open
Courtesy Lamps Inoperative From Both Front Doors
SYMPTOM
* COURTESY LAMPS INOPERATIVE FROM BOTH FRONT DOORS
POSSIBLE CAUSES
-
CTM defective - courtesy lamp driver
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Courtesy lamp driver circuit open to splice
Courtesy Lamps Inoperative From Courtesy Lamp Switch
SYMPTOM
* COURTESY LAMPS INOPERATIVE FROM COURTESY LAMP SWITCH
POSSIBLE CAUSES
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Headlamp switch ground circuit open
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Headlamp switch defective - Courtesy lamp driver
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Courtesy lamp driver open headlamp switch to splice
Courtesy Lamps Inoperative From Either Auxiliary Door
SYMPTOM
* COURTESY LAMPS INOPERATIVE FROM EITHER AUXILIARY DOOR
POSSIBLE CAUSES
-
Auxiliary door switch defective - open
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Courtesy lamp driver circuit open - Auxiliary door switch
Courtesy Lamps On at All Times
SYMPTOM
* COURTESY LAMPS ON AT ALL TIMES
POSSIBLE CAUSES
-
No response (CTM) / CCD bus failure
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Auxiliary door switch defective - dhorted
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CTM defective - Courtesy lamp driver function shorted
