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Wiring diagram for 2000 Stingray 190 4.3MCM. Problem tank to fuel gauge wiring

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The sending unit for your fuel gauge is integrated in the fuel pump as a unit. Yes its in the fuel tank. They are very prone to failure with age.

Posted on May 16, 2017

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Gas gauge staying at empty when tank is full


Spencer, Check all fuses ,plugs and grounding at the tank.The sending unit module, inside the GM's gas tanks were notorious for going bad in this err, when you changed it did you use a quality part? Also the fuel pump sending unit plug/wire harnesses were known issues, so much that replacement pumps would often come with replacement plug to splice into existing harness. Check the attached links,instruction and guides on how to trouble shoot fuel gauge/sending unit, Good luck
"I hope this helped you out, if so let me know by pressing the helpful button. Check out some of my other posts if you need more tips and info."
General Motors Fuel Gauge Troubleshooting American Autowire
GM Defective Gas Gauge Leaves Owners Guessing
Fuel Gauge Tech How To Properly Diagnose Faulty Fuel Pump Sending Unit
GM Fuel Pump Level Sensor Diagnosis Testing

Aug 27, 2016 | 2000 Oldsmobile Alero

1 Answer

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

1 Answer

Wiring diagram of fuel gauge for toyota corolla 2006 - frozen fuel gauge


It is the sending unit, usually the veryable resister and arm. Remove and replace sending unit. It is , unfortunately, located inside of the fuel tank. To confirm gage operation reverse wiring to the guage and it will reverse the guage, confirming tha the gauge.is ok.

Sep 09, 2014 | 2006 Toyota Corolla

1 Answer

Fuel gauge diagram


All of the dash gauges and warning lights get power from the same pink/black wire. You should have a pink or purple wire coming from the sending unit in the tank that provides ground to the gauge.

Jul 29, 2014 | 1971 Oldsmobile Cutlass

1 Answer

Blazer fuse for gas gage which one in th diagram is?


this is not a separate fuse. for gauge is gauge fuse. but fuel gauge not working could be gauge in tank for level. if you ground purple wire to ground .. fuel gauge must be at full

Sep 26, 2013 | 2000 Chevrolet Blazer

1 Answer

Fuel pump wiring diagram


there is two things : fuel gauge and dash fuel gauge. The fuel gauge in tank rated to 0 to 90ohms.disconnect wire at the tank take a variable resistor connect it to wire .read the dash gauge if it move as you move the resistor. if ok fuel tank gauge is at fault

Aug 09, 2013 | 1998 Chevrolet K1500

1 Answer

1989 ford f-150 lariat dual tank wiring diagram


Try this. if you cant see it email me
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Oct 15, 2012 | 2000 Ford F

1 Answer

Prob with 2000 C3500 5.7L fuel pumps.


I don't know if this will come thru or not. You may need to get a shop manual to get all of the diagrams to troubleshoot the circuits.
The diagram I found shows two tanks, and each one has a relay for the pump. The relays and gauge are controlled by the PCM and both pumps are grounded together. This may or may not match your truck.
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Aug 21, 2012 | 2000 Chevrolet 3500

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

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2000 Buick Century gas gauge reads full all the time


You're either looking at a short in the wire that goes to the fuel sender, or a bad fuel sender. If it was just a broken wire, it would read empty instead. The fuel sender is a permanent part of the fuel pump, so that has to be replaced as a unit.

Sep 24, 2009 | 2000 Buick Century

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