Question about 1992 Ford Ranger

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Gas gauge I've tried replacing the sending unit and made sure the wires were clean but can't figure out why the gas gauge won't work

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  • Anonymous Jul 16, 2008

    gas gauge regester full did not move . Had sending unit replaced 2 years ago . noticed today same thing ($500.00) What's up Ford?

  • glohound Feb 14, 2009

    I have the same problem on a 1992 ranger also, just replaced the whole pump and assembly with sending unit and all and the same thing is happening.

  • Anonymous Mar 27, 2014

    said wiring problem what wires

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I have a 92 Ranger that has the same issue. After doing some online research I felt sure it was a bad fuel level sender. However I installed some new dash light bulbs a couple of months back and the fuel gage started working, if only for a few days. I'm now thinking the connector on the back of the gage assembly is not making good contact on the fuel sender circuit. You might want to try to clean the contacts with an eraser and see if that helps.

Posted on Aug 05, 2008

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Where is the anti slosh module in a 1988 mercury grand Marquis ?


Anti slosh module? I've never heard of that. If there is such a thing, it must be on the fuel level sending unit in the tank. It is usually the sending unit at fault when the gas gauge stops working.

Here's how to check if the problem is the sending unit or the gauge in the cluster: you will need a helper to watch the gas gauge needle. Pull the electrical connector apart at the tank, find the gas gauge wire. The power wire for the fuel pump is pink and black, and the ground for it is a black wire, so the fuel sender wire should be a different color. When you figure out which wire is for the gas gauge, turn the key to on, and take a jumper wire and ground the gas gauge wire to the frame. Have a helper watch the gas gauge needle when you ground the wire: the needle should move perceptibly. If it does, the gauge in the cluster is good, and the problem is with the sending unit in the tank. If grounding the wire does not make the needle jump, the problem may be the gauge in the cluster. Be sure that you have made a good contact with ground with the jumper wire.
There is a small match box size voltage regulator on the back of the cluster. This sends low voltage (about 5 volts) through the gas gauge and on to the wire going to the tank. When you ground this wire, it should cause the gauge needle to go either to full or to empty, but you should see the needle move. Remember, key on, then ground the wire. Any movement of the needle means the gas gauge is probably good, and the problem is the sending unit in the tank.

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If your other dash gauges work, which eliminates the gauge fuse, what you need to do first is determine whether it's the "sending unit" which is in the gas tank. This may not be easy as you may have to lower the gas tank to get to the wires that attach to the sending unit. If you're lucky, the wires may have a connector visible close to the tank. There will be one or two wires. Disconnect them, and then have someone turn the ignition on while they watch the gas gauge. While they watch, ground the wires one at a time to a good, relatively clean metal part of the frame. You may need to use a length of wire connected to a good ground on one end, and touch the other end to each tank wire one at a time. If you dash gas gauge is good, when you ground one of the wires the gas gauge will go all the way to the "full" limit.
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Could possibly be the sending unit inside the gas tank not sending a reading to the gauge. Sending unit needs to be replaced. Need to remove gas tank and fuel pump and replace sending unit.

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It may be the sending unit in the tank that needs replacing. Here's how you can check: Turn the key on and disconnect the sender unit at the gas tank. Ground the sender unit's wire with a jumper wire from the truck's harness to ground. Watch the gauge. If the gauge on the dash is good, grounding the sender wire will cause the gauge needle to react and should move to full. This would indicate a new sending unit is required. If the gauge doesn't move when the sender unit is grounded, the gauge is bad and needs replacing. Pull the instrument cluster out to replace the gas gauge. Likely any old ford gas gauge might work-back then, there were not so many production changes.

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have you replaced the gauge or recheck the wires on the sending unit, possibly have a break in the wire

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2001 chevy suburban fuel gauge stoped working


If the sending unit was connected and grounded, I would guess the gauge in the cluster is faulty.

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either the gauge in the cluster is bad or the sender in the gas tank is bad. look on youtube for videos of folks removing clusters and dropping gas tanks and figure out which you want to try first. my experience the sender usually is the bad guy. this is simply a flotation device in the tank which rides on the top of the gas, sends a signal. if you do the sender, make sure you also replace the fuel pump while you are in there as it is 10 years old

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While it could be a bad gauge, as it's an electric gauge, most likely it's the sending unit inside the gas tank. Make sure your fuses are good, and your ground wires are clean and tight, especially under the car. If all that checks out, you might want to drop the gas tank and pull out the sending unit.

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2 Answers

I have a 94 chevy s10 and my gas reads empty while i drive.but when i shut off the truck the gauge moves to different readings.


Is......the problem--"the gas gage reads empty when there is fuel in the tank. OR, The gage moves when the key to turned off ?

If it's the first,
You will need to test the gage and through process of elimination, determin if the Sending unit inside the fuel tank has gone Bad.

If its the second ? - Electrical gauges will move when powered down. Normal

Testing the gauge may not be easy - just depends on your ability.
It is a simple 2-wire gauge circuit, when disconnect (usually need the fuel tank) the gage reads in one direction (either full or empty)
then when shorted-the gage reads in oppisite direction.

Of course you must select the correct wires or you may short out the wrong circuits!! Most GM vehicles use a purple wire & black wire.

A quick method I have used to check the in-take part of the gauge is this.
1st. know there is gas - 1/2 tank works best.
2nd driver's door open, key in run position, engine not running.
3rd gently lift up on the door then let if come back down, gently.
just enough to cause the gas to slosh around.
4th - keep an eye on the gas gage, a bad sending unit in the take will show up as a "twitchy" needle.

Of course, if the gage never leaves empty - sloshing won't work.
I have a known good sending unit I can plug into the vehicle and simulate different levels of fuel - if the gas gage works, I know the problem is in the tank.

Let us know.

Dave

Feb 28, 2009 | 1996 GMC Sonoma

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