Question about 2002 Buick Rendezvous

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Gs gauge is eractic. Cheecked connector under left side harness clean and ok. How do I change gas guage sending unit?

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Have to remove fuel tank from vehicle

Posted on May 28, 2011

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OHMS Resistance for temp gauge


The OHM's are different from manufacturers. Usually the work or don't. I just test the leads and heat up the sensor with a lighter. If the resistance changes, it is good. If it doesn't read or doesn't change, it is bad. Wires usually break right behind the plug. Check for continuity at the lead and about two inches back on the wire.

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How do I fix my gas gauge in my 1989 ford crown Victoria ltd?


Nine times out of ten, it is the sending unit in the tank that is the problem. To check, use a sort jumper wire to ground the gas gauge wire to the frame while watching the gauge needle on the dash, with the key in on position.

Find the gas tank electrical connector by the tank. Pull it apart, and on the harness side of the connector, locate the wire going to the sending unit. I don't know what color it is, but the fuel pump wire is a pink wire with black stripe and there is a black wire for the ground. The other wire should be for the dash gauge's sending unit. Have a helper turn the key to on and watch the gas gauge for any perceptible movement while you use the jumper wire, insert one end into the terminal for the gauge's sending unit wire (this is on the harness side of the connector, not the gas tank side), and touch the other end to the car frame-you are grounding it. If the dash gauge is good, the needle should move a lot, usually will move more than half way, one way or the other. So if it does, you know the dash gauge is good, and the problem is in the sending unit.

If it is the sending unit, it is quite a job to drop the tank, pull it out from under the car, then pull the fuel pump and sending unit out. You might be fighting a lot of rust on an '89-get some penetrating oil. And look for the removal procedure in a repair manual. It's not terribly difficult if you are handy with tools...and like to get dirty. Those hoses on the tank have been stuck on there a long time. Good luck.

Sep 15, 2014 | 1989 Ford Crown Victoria

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My gas guage doesn't work in my truck. 1994 ford ranger,single cab,4.0L V6.


The most common reason is the sending unit inside the gas tank, look under the truck and locate the fuel tank, look for wires going to the tank,the wires will lead to top of the tank, unplug connector and fuel gauge should go to full, if the gauge moves then its the sending unit inside the tank, this would mean the wiring is good and the gauge also works and that leave the sending unit. good day.

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Gas guage does not work


This issue is probably caused by a faulty fuel sending unit or a bad connection by the gas tank. If possible try wiggling the fuel pump harness by the tank and see if gauge may start working.The particular harness I am referencing will contain a purple wire which is power wire to the fuel pump.This plug and harness also contains the wires that connect to the fuel gauge.This harness is located by the right rear tire by the gas tank.

Jul 18, 2010 | 2003 Buick Century

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Fuel guage was erratic then went past full mechanic installed a new pump and sending unit now it stayed at 1/4 tank and when I filled it itwent below empty. bad sending unit or bad guage or bad mechanic?


Test the gauge by using a test light ,and grounding the test light clip to a good known ground,then touch the pink wire on the connector harness going to the tank,with the connector unplugged,and key on,the gauge will move slowly to the empty mark,and lower ,then remove the test light and it will go past full,if it does this,it is a good gauge,and the sending unit,was put in wrong,or the part was bad.

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Gas gauge is not registering level consistently . level changes up and down. i fill gas tank up and it will go down to a3/4 of a tank fairly accuratly then gets erraic, going to full and back 3/4 very...


sounds like its time for a new sendinding unit, this is the part that hold the fuelpump inside the tank, and has a float arm, this is what tell you how much gas is in the tank, heres a picture of it,this comes with everything even the pump,also make sure to wire in the new connector,these trucks have connector problem,good luck.also check the ground that go to that connector, follow them,may go to rear frame on the leftside, remove and clean them.d2f4ba0.jpg

Apr 07, 2010 | 1999 Chevrolet Blazer

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Replaced Fuel Sending unit on 1986 Chevy Truck


Check the ground wire at the wiring harness at the fuel tank. If it has a good connection then check the power wires to the tank. You may have a bad pigtail going to the tank. A replacement harness is available at NAPA.

Mar 28, 2010 | 1986 Chevrolet C1500

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Need a fuse diagram for fuses in 2000 malibu - currently seeking for gas gauge and headlights thanks!


under hood fuse box on drivers side of vehicle, there should be a number diagram on inside of cover.ight headlight is #50 and left headlight is # 51, they are mini fuses. fuel guage works off of sending unit in tank! if it does not work check sending unit or a bad gauge.

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My gas gauge on my 93 ford mustang quit working. the gauge is stuck on full. Help


i suspect a broken wire between guage and sender unit in tank, but the sending unit could be bad,find the wire to the float guage in the tank and disconnect it, if fuel level does not change then then touch the wire to a ground, if the guage changes then the wire is ok and the unit is bad, if it does not change check wiring and guage for faults.

Jul 30, 2009 | 1993 Ford Mustang

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My gas gauge is stuck on full in my 2000 ford mustang


You will need to locate the wire to the fuel sending unit at the fuel tank.

Once you locate the wire, disconnect it and see if the guage goes to 'E". If the guage goes to "E", you probably have a bad sending unit.

To double check, ground the same wire to clean metal on the frame with the key in the "on" position (not running). If the guage does not move, the guage is bad. If the guage moves from E to F, the sending unit needs to be replaced.

Apr 11, 2009 | 2000 Ford Mustang

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