here is how you test that system EASILY.

Disconnect the wire to the Pressure Sender.

Turn ignition on but do not start car.

Note where the Pressure Gauge Pointer is resting. ( full scale or zero...anything else means a bad Pressure Gauge )

Ground out the Pressure wire to the frame.

The Gauge should now read Full defelection in the Opposite direction. ( full should zero or zero should read full )

If the gauge shows full deflection ; then the sender is bad. if the gauge does not move ..then wires or gauge or connection problems.

This test can be used on ANY Pressure , temp or fuel gauge in any car but be Mindful of any Computer Controls on Newer vehicles or you can fry them...


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