Fuel Level Indication System

The fuel level indicating system is a magnetic-type indicating system, consisting of:

• The sending unit located in the fuel tank.
• An "anti-slosh" module located on the back of the instrument cluster.
• A fuel gauge located in the instrument cluster.

The sending unit changes resistance according to the level of fuel in the fuel tank, which varies the current flow through the gauge. The pointer position varies proportionately to the current flow. In this system, the sending unit resistance is low when the fuel level is low and high when the fuel level is high.

The pointer of the magnetic gauge remains in position when the ignition is turned to OFF position.

NOTE: An "anti-slosh" module has been added to dampen out fluctuating fuel signals from the sender.

Fuel Gauge

The magnetic fuel gauge (9280) movement consists of three primary coils, one of which is wound at a 90 degree angle to the other two. The coils form a magnetic field which varies in direction according to the variable resistance of the sending unit. A rotor magnet, to which a shaft and pointer are attached, rotates to align to this primary field, resulting in pointer position. The bobbin/coil assembly is pressed into a metal housing which has two holes for dial mounting. There is no adjustment, calibration or maintenance required for these gauges.

 CAUTION: Do not remove magnetic gauge pointers; the gauge cannot be recalibrated.

NOTE: An instrument voltage regulator (IVR) is not required for this system.

Instrument Cluster Gauge Amplifier

The instrument cluster gauge amplifier (10E849):

• Provides a delay to fuel gauge to prevent the fuel gauge pointer from fluctuating as a result of excessive movement in the fuel tank.
• Is a small printed circuit board which snaps into a pocket on the back of the instrument cluster.

The electrical connections for ignition, ground, input from fuel sender and output to fuel gauge are made through a spring-type connector on the instrument cluster gauge amplifier to the flex circuit on the cluster. There are no provisions for calibration or adjustment of the module.

Instrument Cluster Gauge Amplifier

Fuel Sending Unit

The fuel pump (9350) consists of a variable resistor controlled by the level of an attached float in the fuel tank.

• When the fuel tank is low, resistance in the sender is low and movement of the gauge indicator dial is minimal (from EMPTY position).
• When the fuel level is high, the resistance in the sender is high and gauge indicator dial movement is greater (further from the EMPTY position).