TESTING '57 GAUGES
Note : these tests are made with sending units removed from car
OIL PRESSURE: I use an air compressor and blow air through the fitting at rear of gauge. Be careful ! Don't use full pressure of the compressor !
Below you'll see the temperatures readings on my '57
Imp. gauges, see table to convert in °F. Remember that normal T° is between 170
and 190° F (thermostat opens at 160 or 180, depending if car is non A/C or A/C).
So in normal conditions the needle must not go after the middle mark.
GAZOLINE : the dash gauge is wired to:
The tank unit is wired to:
You move the arm to different positions according to the reading of the gauge ; at each position you shut off the supply and measure the resistance between tank gauge pin and ground:
Note: i 've not tested the amperemeter gauge, i haven't any power source ..
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