Section 13-01: Instrument Cluster—Conventional
1994 Mustang Workshop Manual
DIAGNOSIS AND TESTING
Symptom Chart
Condition
Possible Source
Action
Instrument Cluster Inoperative
Fuse.
Circuit wiring.
Instrument cluster printed circuit.
Go to
Pinpoint Test A
.
Fuel Level Reads Erroneously
Circuit wiring.
Fuel gauge.
Instrument cluster printed circuit.
Fuel tank sending unit.
Go to
Pinpoint Test B
.
Coolant Temperature Reads Erroneously
Water temperature indicator sender unit.
Circuitry open/shorted.
Instrument cluster temperature gauge.
Instrument cluster printed circuit.
Go to
Pinpoint Test C
.
Oil Pressure Indication System Inoperative
Oil pressure sender.
Circuitry open/shorted.
Instrument cluster printed circuit.
Gauge/lamp.
Go to
Pinpoint Test D.
Charge Indicator Reads Erroneously
Circuitry open/shorted.
Damaged bulb.
Instrument cluster printed circuit.
Go to
Pinpoint Test E.
Speedometer/Odometer/Trip Odometer Reads Erroneously
Circuitry open/shorted.
Vehicle speed sensor (VSS).
Speedometer/odometer.
Go to
Pinpoint Test F.
Odometer Reads Erroneously
Speedometer gear.
Circuitry open/shorted.
Instrument cluster printed circuit.
Speedometer/tachometer assembly.
Go to
Pinpoint Test G.
Tachometer Not Reflecting Engine Speed
Circuitry open/shorted.
Go to
Pinpoint Test H.
All Warning Indicators Inoperative
Circuitry open/shorted.
Instrument cluster printed circuit.
Go to
Pinpoint Test I.
Low Coolant Level Indication Not Operating Properly
Blown fuse.
Circuitry open/shorted.
Damaged low coolant sensor.
Go to
Pinpoint Test J.