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Fuel gauge wiring schematic

Gas gauge not working / needwire color running to gauge

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Needing color coded wiring schematic for junction of fuel pump and fuel level float inside gas tank


They are 2 ways to get this. An internet search using your year make and model car with the term fuel pump wiring or wiring diagram usually pulls up a collage of good diagrams. Or the autozone site has a help site at the bottom of its help page, There is a free part and a pay part, but free info will supply diagrams.

Aug 18, 2015 | 2000 Ford Escort

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I have a 94 Camaro 3.4 and I need to know what color the hot wire on the fuel pump is. I get all kinds of answers from grey, black, pink. What color is it if I hotwire the pump to check it. Also wh


I don't have the diagrams. Not buying it either. But it is either pink or grey. Anything black is ground. Since 99% of the ones I do is grey, I choose this one. A 94 has 4 wires. Two are ground. one is the fuel pump, the other is the fuel sender/gas gauge. Ground it , then add 12 volts to the others. It won't hurt it. If you won't the wiring schematics, Go to alldatadiy.com ad you can buy them, plus everything else about your car.

Dec 28, 2014 | 1994 Chevrolet Camaro

1 Answer

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.

Oct 24, 2014 | 1988 Mercury Grand Marquis

1 Answer

Fuel gauge wiring schematic


no,it's called a float inside the gas tank must be replaced

May 19, 2014 | 1997 Cadillac Seville

1 Answer

I just got a 2000 Ford Ranger XLT 4x4, 4.0, std tran. The oil gauge doesn't work (engine runs fine) Previous owner said something about the ground for the instrument cluster (?) Also the gas gauge is off...


You should invest the $25 in a repair manual from the auto parts store. It has wiring schematics in the back of the book. Get yourself a decent digital volt ohm meter and start tracing the wires for your oil gauge, or you could try changing out the oil sending unit on the motor. It may be bad and they're not that expensive. As for the gas gauge, it sounds like you have a sticking float in the tank. As far as I know they do not sell the float and the fuel pump separate from each other. I would just watch the miles per tank of gas on the trip meter, unless you absolutely have to have a gas gauge then it's time to change the whole pump assembly.

Oct 29, 2013 | Cars & Trucks

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Help my 04 chevy cavalier he gas gauge will not work.. I have replaced the insterment cluster and the part in the tank.. When i start it my gauge will read full but will drop soon as you take off and there...


to check it . wire at the fuel tank gauge unplug it the black and purple wire for gauge. put a variable resistor , fuel gauge is rated 0 to 90 ohms. So variate the resistor and see if fuel gauge move. if it does fuel sender have problem or inside tank wire

Aug 26, 2013 | 2002 Chevrolet Cavalier Coupe

1 Answer

I have a 2003 crown victoria cvpi the fuel gage is not working, i belive that if i knew the color of the positive wire going to /from gas tank i could rewire or repair the fuel gauge problem the car was...


These should be the colors coming out of the plug on the fuel pump.

(GY/RD)signal return
(RD/PK)Fuel tank pressure transducer sensor
(BN/WH)Reference voltage
(YE/WH)Fuel pump/fuel gauge sender
(BN/WH)Fuel pump Power, return
(PK/BK)Fuel pump Power, feed
(PK/OG)Ground

I hope this helps you out.

Mar 14, 2011 | 2003 Ford Crown Victoria

1 Answer

Faulty gas gauge


Most of the time its is the sending unit in the fuel tank. The test for it is to use a variable resistor that is hooked up to the wiring at the fuel tank and watch the fuel gauge if the gauge works ok thats makes 100% sure its the sending unit. At 245 ohms the gauge should read full, 180 ohms for 3/4 full, 160 ohms for 1/2 tank, 100 ohms for 1/4 tank and 42 ohms for empty. The color of wires at the fuel tank is purple wire and black wire. You can also use fixed value resisters. If the fuel gauge the wires from the sending unit to computer then to gauge for bad connections, shorts, broken wire and bad grounds. If the wires test ok that only leaves insterrment cluster or computer which even most dealers can't test eather one but the insterment cluster would be a more common problem then the computer. But about 95% of the time it will be the fuel level sensor in the gas tank that causes the problem. Good luck.

Jan 08, 2011 | 2000 Pontiac Grand Prix

1 Answer

Replaced fuel pump but had to put a in-line toggle now no gas gau


What color wire did you run the toggle switch wire too. Pink?

Aug 22, 2009 | 1991 Chevrolet S-10

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