Panel and warning lights
- Make
- Fiat
- Model
- 500 Classic Workshop Manual
- Year
- 1957–1975
- Section
- Panel and warning lights › Panel and warning lights
Panel and warning lights
All the gauges are clustered in a single instrument mounted on the dashboard above the steering column. Incorporated in this cluster is the parking light pilot light, generator charge indicator, fuel reserve supply indicator, low oil pressure indicator, and the speedometer with mileage recorder.
The parking lamp indicator glows green when the ignition lock switch key is in either position 1 or 2 once the toggle switch on the instrument panel has been operated.
The generator charge indicator shows red only when the ignition is turned on. It should be extinguished when the generator output is sufficient for battery charge (12.6 ± 0.2 volts) with the engine running at a speed of 1100 rev/min and the headlights switched off.
The fuel reserve supply indicator shows red only when the ignition is turned on and the amount of fuel in the petrol tank has dropped to approximately .8 to 1.1 Imp. gallons.
The low oil pressure indicator shows red only when the ignition is turned on and should be extinguished when the oil pressure reaches 7.1 to 21.3 Ib/sq in, and opens the sending unit contacts. Once the engine is at normal operating temperature but at a speed below 1000 rev/min the indicator might light up even the pressure is under control and with normal operation.
All the bulbs fitted to the above described units are of the tubular 2.5W type and to renew a bulb extract the bulb holder from the rear of the instrument cluster and release the bulb which is attached by a normal bayonet coupling.
Fuel reserve supply indicator sender unit
The fuel reserve supply indicator should be checked for correct indication by allowing the fuel tank to empty and then inserting .8 to 1.1 Imp. gallons at which stage the light should extinguish. Any failure to do so should be checked as follows:
- Ensure that the indicator bulb operates correctly.
- Check for complete circuit between the sender unit and the indicator bulb.
- If the sender unit float bracket is distorted the bulb will indicate a reserve supply of fuel greater or smaller than specified. The bracket should be adjusted to give correct indication of fuel level.
- The sender unit could have been inadvertantly damaged in which case the unit must be renewed.
Parts & tools for this job For 1957 Fiat 500 Classic
- TOOLDigital multimeterSearch: automotive digital multimeter
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- TOOLWire crimper and connector kitSearch: wire crimper connector kit
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