System Description

With the Ignition Switch in RUN, the Instrument Cluster is powered through Fuses 7 and 18 of the Interior Fuse Panel.

The Fuel Gauge, Anti-Slosh Module and Fuel Gauge Sender make up the Fuel Indicating System. The sender is a variable resistor connected to a float in the fuel tank. When the duel is low, resistance is low (15 to 22.5 ohms); when fuel is high, resistance is high (145 to 150 ohms).

Anti-Slosh Module

The Fuel Anti-Slosh Module delays the signal to the Fuel Gauge to keep the Fuel Gauge form fluctuating during moments of excessive movement.

Charge

The Voltmeter measures vehicle system voltage with the Ignition Switch in the RUN position.

The Charge Indicator receives a charge signal from the Alternator/Regulator. The warning indicator will light when the charge at the Alternator falls below the normal operating range.

Oil Pressure Gauge

The Oil Pressure Gauge is controlled by the Oil Pressure Switch. With normal oil pressure, the switch is closed and the gauge indicates a reading in the NORMAL range. With low oil pressure, the switch opens and the gauge indicates a LOW reading.

CAUTION: Do not ground either terminal of the instrument Voltage Regulator.

Coolant Temperature Gauge

The Coolant Temperature Gauge connects to the Coolant Temperature Sender. The sender is a temperature-sensitive variable resistor. When the coolant temperature is low, resistance is high (74 ohms); when the coolant is high, resistance is low (9.7 ohms).

Warning/Message Indicators, Illumination Lamps

The following Warning/Message indicators are controlled by their respective switches and modules. The Instrument Cluster acts only as a display.

- AMP Indicator
- Air Bag Indicator
- Anti-Lock Indicator
- Brake Warning Indicator
- Check Engine Indicator
- Fasten Seat Belt Indicator
- High Beam Indicator
- Left Turn Indicator
- Right Turn Indicator

The Illumination Lamps receive power from the 19 (LB/R) wire. The intensity of the Illumination Lamps can be varied. The 19 (LB/R) circuit is energized when the Main Light Switch is in PARK or HEAD.

SPEEDOMETER

NOTE: The Programmable Speedometer/Odometer Module (PSOM) is serviceable only as an entire cluster assembly. It is important to keep the speedometer face-up since speedometer function will be affected by storage in the face-down position.

The Programmable Speedometer/Odometer Module (PSOM) receives its input form the Rear Anti-Lock Brake Sensor. The liquid crystal display (LCD) odometer is a combination trip odometer and total odometer. Normally displayed is the total odometer. Pressing the SELECT button on the upper right side of the Speedometer will display the trip-odometer. Pressing the RESET button while the trip-odometer is displayed will zero out the trip-odometer.

The Speedometer is also used to provide a speed signal for the EEC Module and Speed Control System.