LED Gauge Alert System

Fig. 2 Gauge:

The fuel, temperature and ammeter gauges are equipped with a Light Emitting Diode (LED) mounted in each of the gauge dials This diode will illuminate and alert the driver that the system is malfunctioning. The electronic sensor circuit is mounted on the gauge housing. The printed circuit board is permanently attached and is not serviceable. If the LED is malfunctioning, the gauge and the printed circuit board must be replaced as an assembly.

The oil pressure warning switch, mounted on the engine, is controlled by engine oil pressure.

When engine oil pressure is high (normal operating condition) the switch is held in the Off position allowing no current to flow to the oil pressure warning lamp on the instrument panel.

When engine oil pressure is low the switch is in the On position allowing current to flow to the oil pressure warning lamp on the instrument panel causing the instrument panel to be illuminated. When the switch is in the Off position it completes the circuit for the electric choke heater.

FUEL GAUGE


When the gauge indicator shows approximately 1/8 tank of fuel remaining, the LED will light alerting the driver to a low fuel situation.

TEMPERATURE GAUGE


When gauge indicator shows engine temperature approximately 240 to 260° the LED will light alerting the driver to an overheat condition.

AMMETER GAUGE


This LED operates independently of the gauge indicator and monitors system voltage. The LED will alert the driver of three charging system potential malfunctions.
1. A discharging condition, caused by excessive electrical demand on charging system (engine at idle RPM).
2. A weak or defective battery with ignition switch in the On position (before the ignition switch is moved to the Start position).
3. A weak or defective battery with minimum demand on charging system, while vehicle is being used in stop and go driving (intermittent LED illumination occurring).