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1996 ford ranger fuel gauge stays on full . I had a new sending unit put in but did not fix the problem. Could the cluster panel need replaced? the lights by the fuel gauge and the lights by the battery gauge are not working also

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Sounds like a short, check the wiring harness

Posted on Feb 03, 2010

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I have a97 chevy c1500 the fuel gauge never worked,so i put a new sending unit in still dont work gauge reads past full @all times can anyone help


Your problem with you fuel gauge is not the sending unit or the gauge in the cluster. You have a broken ground wire in the the harness that goes to the sending unit. look for broken wires or wires that have bin picked with a test light they will have corrosion

Jan 26, 2014 | Chevrolet Cars & Trucks

2 Answers

I have a 2003 GMC Envoy and my gas gauge has been flowing up and down to empty and full recently it has stayed on empty. How do I fix it?


Ensure that all of the wire connections are clean, secure and corrosion-free.

  • 2 Check your fuel gauge fuse if the gauge's indicator stays on empty when your turn on the ignition. If the fuse is good, join the sending unit connector to ground. Replace the sending unit if the gauge indictor moves to the full line.
  • 3 Ground the terminal located on the back of the fuel gauge with a jumper wire if the indicator doesn't move. If it does move, consider replacing the wire between the fuel gauge and the sending unit. A poor ground is frequently responsible for fuel gauge problems.
  • 4 Release the wire that connects to the fuel tank's sending unit. Confirm that there's no worn insulation that would permit wire contact to the body or frame. A fuel gauge reading of full generally indicates a problem with the tank unit, not the wiring.
  • Oct 18, 2011 | 2003 GMC Envoy

    1 Answer

    1996 ford ranger fuel gauge stuck on empty


    It's not really easy to tell, you need to test for power and ground at the sending unit at the fuel tank, while someone is watching the fuel gauge inside the vehicle. 90% of the time (especially on Ford's) it's a faulty sending unit in the fuel tank, which is usually sold with the fuel pump...if not, I would replace the pump while I had the tank out anyway just as a precautionary measure.
    . the "float' is the part that of the sending unit that registers fuel level and sends that

    Dec 13, 2010 | 1996 Ford Ranger SuperCab

    1 Answer

    Trying to locate electrical junction to test fuel level sensor


    Fuel Level Indication System The fuel level indication system is a magnetic gauge system. It consists of a magnetic fuel gauge (9280) mounted in the instrument cluster (10849) and a sending unit located in the fuel tank (9002) with an instrument cluster gauge amplifier (10E849) in series between the two. No instrument voltage regulator is used with this system. Fuel Gauge
    The magnetic gauge movement consists of three primary coils, one of which is wound at a 90-degree angle to the other two. The coils form a magnetic field which varies in direction according to the variable resistance of the sender unit which is connected between two of them. A primary magnet, to which a shaft and pointer are attached, rotates to align to this primary field, resulting in pointer position. The bobbin/coil assembly is pressed into a metal housing which has two holes for dial mounting. There is no adjustment, calibration or maintenance required for these gauges. The instrument cluster amplifier is calibrated to the fuel gauge. The instrument cluster amplifier and fuel gauge must be replaced as a system. Instrument Cluster Gauge Amplifier/Check Gauge Module
    The instrument cluster gauge amplifier electrically averages fuel sender readings so the fuel gauge displays actual fuel level and not fluctuations due to sloshing in fuel tank. The instrument cluster gauge amplifier is a small printed circuit board which latches into a pocket on the back of the instrument cluster. The electrical connections for ignition, ground, input from fuel sender and output to fuel gauge are made through a spring-type connector on the instrument cluster gauge amplifier to the instrument cluster printed circuit (10K843) on the instrument cluster. There are no provisions for calibration or adjustment of the instrument cluster gauge amplifier.
    Fuel Sending Unit
    The fuel sending unit consists of a variable screened resistor made up of a ceramic substrate. It is controlled by the action of an attached float in the fuel tank. When the fuel level is low, resistance in the sending unit is low. When the fuel level is high, the resistance in the sending unit is high. As the float moves from empty to full, the resistance will gradually and continuously increase. f9e3b50.gif

    Mar 10, 2010 | 1997 Ford Ranger SuperCab

    1 Answer

    Gas gauge/tank


    I am very familiar with this problem, u will need to replace the gas gauge sending unit in the fuel tank.

    Jun 17, 2009 | 1996 Ford Ranger SuperCab

    1 Answer

    Ford thunderbird fuel gauge stays on full


    More than likely it is the sending unit inside the fuel tank. You will need to remove the fuel tank and take the sending unit out of the tank and replace it.

    May 24, 2009 | 1995 Ford Thunderbird

    1 Answer

    Fuel gauge not working properly Hyundai Accent


    The fuel gauge utilizes a voltage stabilizer located on the back of the instrument cluster. if it's faulty it could cause this problem. The other causes are a wire fault (short) between the gauge and the tank sending unit and the sending unit itself being corroded and stuck in the full position (the float assembly that is). One way to quickly isolate (and maybe eliminate) the problem is to get a used cluster from a wrecking yard and swap it out. If it works normally, there you go... if not you will need to access the tank sending unit (this usually, but not always, involves draining and dropping the tank to get to it. Some cars have an access panel in the body over the fuel tank for this purpose... look under the carpeting in the rear of the vehicle) Once you have access disconnect the power wire (usually red or with a red stripe), and with the key on, the gauge should drop to empty. If it doesn't, the problem is not the sending unit. Hope this helps...;-)

    Apr 14, 2009 | 1996 Hyundai Accent

    1 Answer

    94 ford ranger fuel gage not working right


    what assembly did you replace? The sending unit? Make sure the ground to the sending unit it clean.

    Mar 27, 2009 | 1994 Ford Ranger Supercab

    2 Answers

    Fuel gauge not working all the time.


    This is a normal concern.
    The instrument cluster uses 4 different operating modes to calculate the fuel level:
    Anti-slosh (default mode)
    Key OFF fueling
    Key ON fueling
    Recovery
    After a fuel fill up, the time for the fuel gauge to move from empty (E) to full (F) ranges from 2 seconds to 55 minutes depending on which operating mode the fuel gauge is in.
    The default fuel gauge mode is called the anti-slosh mode. To prevent fuel gauge changes from fuel slosh (gauge instability due to changes in fuel sender readings caused by fuel moving around in the tank), the fuel gauge takes approximately 55 minutes to go from empty (E) to full (F).
    The key OFF fueling mode (2 seconds to read empty [E] to full [F]) requires 3 conditions be met:
    The key must be in the OFF position throughout the entire refueling of the vehicle.
    At least 15% of the vehicle's fuel capacity must be added to the fuel tank.
    The instrument cluster must receive a valid key ON fuel sender reading within 1 second of the key being put into the RUN position. The key ON sample readings are considered valid if the fuel sender reading is between 15 ohms ± 2 ohms and 160 ohms ± 4 ohms.
    If these conditions are not met, the fuel gauge stays in the anti-slosh mode, which results in a slow to read full (F) event.
    The key ON fueling mode (approximately 90 seconds to read empty [E] to full [F]) requires 3 conditions be met:
    The transmission is in PARK (P).
    The key is in the RUN position.
    At least 15% of the vehicle's fuel capacity must be added to the fuel tank.
    In key ON fueling mode, a 30-second timer activates after the transmission is put into the PARK (P) position (automatic transmissions). When the 30-second time has elapsed and at least 15% of the vehicle's fuel capacity has been added, the fuel gauge response time is 90 seconds to read from empty (E) to full (F). When the transmission is shifted out of PARK (P), the fuel gauge strategy reverts to the anti-slosh mode. The key on refueling mode prevents slow to read full events from happening if the customer refuels the vehicle with the key in the RUN position.
    Recovery mode is incorporated into the instrument cluster strategy to recover from a missing fuel level input during a refueling event. Missing fuel level inputs result from intermittent opens in the fuel sender or its circuits. Recovery mode (empty [E] to full [F] approximately 20 minutes) is initiated when the following 2 conditions are met:
    The instrument cluster is in the anti-slosh (default) mode.
    The actual fuel level in the tank is greater than what is being displayed by the fuel gauge

    Feb 18, 2009 | 1983 Mercury Grand Marquis

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