Fuel gauge for honda civic 1995 stock on full?

Fuel gauge for honda civic 1995 stock on full?

The fuel level sending unit or level sensor is the most common cause beside the gauge itself. This is how the circuit work:

The fuel gauge sending unit's resistance varies from about 2-5 ohms at full, to about 110 ohms at empty. When you turn the ignition switch off, the gauge remains at the last reading until you turn the ignition switch to ON (II) or START (III) again.

Make sure you check fuse # 15 (10A) in the under dash fuse/ relay box before starting checking the fuel sending unit (FSU)

This is how to test the fuel sending unit (FSU). It locates near the fuel pump. Ignition key is in OFF position (I) :

Remove the rear seat cushion and the access panel to expose the fuel pump and the fuel level sending unit (FSU). Disconnect the 3P (3 wires or cavities) connector from the FSU,

Connect a Volt meter between the Black/ White wire (Negative probe) and Yellow/ White wire (Positive probe) then turn the ignition key on (engine is not running). You should have about 5-8 volts. If not repair the open wire(s)

Then remove the FSU from top of the fuel tank and perform the resistance test for the float: Hold the FSU in up position, look straight into the FSU connection terminals; set your Volt meter to OHM (Resistance) and measure between the left side terminal and the middle one: By moving the float in all of the way UP is Full tank and all of the way DOWN is Empty. The Middle way is Half a tank:

At Full float position: The resistance should be between 105-110 Ohms.
At Half the tank: The resistance should be between 25- 40 Ohms.
At Empty: Should read between 2- 5 Ohms.

If the reading is not within the indicated ranges: Replace the FSU. The following link contains some useful pictures, it's for a Hatchback but it help for your visualization:
http://honda-tech.com/honda-civic-del-sol-1992-2000-1/diy-92-95-eh-eg-ej-low-fuel-sender-installation-wiring-2907084/