Grand Marquis V8-302 5.0L VIN F TBI (1984)
The low engine oil level warning system is used as standard equipment on 1 984 Continental, Mark VII, and Lincoln Town Car, and as optional
equipment on 1984 T-Bird/Cougar, LTD/Marquis, Crown Victoria/Grand Marquis with 3.8L and 5.0L engines. The schematic (Figure 20), diagnosis,
and testing information has been updated to assist the technician.
Figure 18
Figure 19
This system consists of a float type sensor mounted to the side of the engine oil pan, an electronic control module, and an instrument panel warning lamp
(Figures 18 and 19). The warning lamp should come on during engine starting as a bulb prove-out. When the ignition switch is turned to the Run
position, the control module determines whether the sensor is grounded (oil low) or ungrounded (oil not low). If the oil level is approximately 1.4 liters
(1.5 quarts) or lower, the relay turns the warning lamp on. The lamp remains on until the ignition is turned off. After the ignition is turned off, the module
will not reset for approximately 90-150 seconds. The delay allows time for oil drainback before another reading is allowed to occur. If the engine is
restarted during this delay period, the last reading will be displayed.
Major Components and Function
Sensor
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Located horizontally in the side of the oil pan.
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Is normally open electro-mechanical float-type device.
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When oil level is low (approximately 1-1/2 quarts), the float drops and closes the electrical circuit to the relay.
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The connector to the sensor is a new "push-pull" design.
