Hi Zoltan,

    Assuming you have checked fuse, and easy things, loose wires, etc.. You
can check the rest of the complete fuel gauge system by: Removing the two
leads at the tank sending unit. With the key on/engine off, check for
voltage across those leads. If there is 10.5 volts the complete system (less
the sending unit) is in order. You can check the gauge by shorting the two
leads together with the key on, and the gauge should "peg". Pull the sender
and check for a problem, replace as needed!
    If you have no or low voltage at the leads, there is a problem is the
circuit. To check the system start with a Bentley and tracing from ground
back to power. I would put the voltage stabilizer high on the list.

Have a good one.

Howard

Subject: Gas gauge is not showing anything