To wire a fuel gauge, first, connect the power supply wire (usually marked as "B+") to the positive terminal of the gauge. Next, connect the ground wire (often marked as "GND") to a suitable ground point. Then, attach the sender wire (usually marked as "S") from the fuel level sender unit to the gauge's sender terminal. Ensure all connections are secure and insulated to prevent short circuits.
The fuel gauge will no longer give an accurate reading.
On a Super Beetle, the fuel gauge sensor wire is typically a green wire. This wire connects the fuel level sender in the gas tank to the fuel gauge on the dashboard. It's important to check the specific wiring diagram for your model year, as color codes can vary slightly. Always ensure proper connections to avoid gauge malfunction.
It is the ground wire for the fuel pump. The Red wire is the power wire for the pump. the dark blue is the signal wire for the gauge and the black is the ground for the gauge.
A 1990 Jeep Cherokee malfunctioning fuel gauge can be caused by a broken ground wire. The gauge will not function if the fuel float in the fuel tank is broken.
fuel sending unit broken wire or gauge is bad
possible fuse or bulb in dash. or worse a loose wire/rat bit a wire.
The gauge could be bad, the fuel gauge sending unit in the gas tank as part fo the fuel pump could be bad you could have a bad ground wire you could have a broken wire in the harness runnign from the fuel tank to the gauge.
Grey
To wire the fuel gauge for a 1972 Volkswagen Beetle, connect the gauge's positive terminal to the ignition switch's 12V power source. The negative terminal of the gauge should be grounded to the vehicle's body. Connect the fuel sender unit's wire to the gauge's sender terminal, and ensure that the sender is properly grounded as well. Always consult the wiring diagram specific to your model for accurate connections.
pink
The fuel gauge is a very simple affair. The gauge itself, a 3 terminal voltage regulator and the in tank level sensor. Check fuses first, check for a good ground to the fuel gauge sensor on the tank. Pull the wire on the tank sensor, ground the wire, with key on gauge should deflect. No gauge movement means bad gauge or regulator. Reconnect wire. Check for 12V at the input of the voltage regulator, check for around 5V at the gauge side of the VR. If no suspect bad VR. If yes suspect bad gauge. If gauge does deflect when grounding tank sensor wire the intank sensor is bad and must be replaced.
Your sending unit in the fuel tank may be bad, the wire connector could be disconnectged or there is a broken wire in the circuit, or the gauge itself has an issue.