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It does not got power to the gage in the tank

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  • Subaru Master
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Probly a bad ground or corroded sending unit--ull need to get under car and investigate-use jack stands for safety--sometimes u can disconnect connectors and clean um etc--get a repair book in library or go chiltons inline

Posted on Dec 31, 2010

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Posted on Jan 02, 2017

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2 Answers

When i connect a test light to the wire at the gas tank and turn the key on do the test light suppose to come on?


First things first my friend. You must test the gage to be sure it is good. Normal procedure is: Switch off, unplug the wires from the sending unit at tank, connect jumper between the power wire and ground wire in the connector block, go to the switch and turn it to run position. If the needle goes to full, the gage is good. Turn the switch off. Now, be sure the connection is plugged in completely and you've a GOOD ground on the sending unit tab on the top of sending unit. No ground, no working needle. Use the test light to find if there's continuity with ground tab using power wire and touch the ground. No light, work with it till you do. Clean stuff to make the ground on tab work. Once test light does light between power and ground tab, your good. Gage should definitely be working now. If it doesn't work, this calls for replacing the sending unit in tank by dropping the tank first. Then it's easy to replace the sending unit.

Jul 20, 2017 | Ford Cars & Trucks

1 Answer

Gas gage does not work


Could be the gage or the sender unit. Have someone take the wire off the sender unit at the fuel tank and touch it to ground If the gage goes to full tank the replace the sender unit. Could also be a broken wire from the gage to sender

May 31, 2015 | Cars & Trucks

1 Answer

My fuel gauge is not working, have a 70 Dodge Challenger, have replaced sending unit in tank, dash unit, voltage limiter and checked continuity between wires to gauge and sending unit, and made sure dash...


Only thing I can tell, with all you've checked, is the power to the gage isn't there. If the tank sending unit ground to frame is not connected, the gage will go past the full mark. No power to the gage it will stay at empty side. Power goes from fuse to gage, gage to sending unit and back to gage. Make sure the fuse is good on both sides of it. The gage just isn't getting power from the fuse.

Jan 13, 2018 | Dodge Challenger Cars & Trucks

1 Answer

Runs great til fuel tanks reaches half way mark then cuts out or dies


Are you sure the fuel gage is reading accurately most gages just use a resistor to gage how much fuel is in the tank over time its easy for the gage to read off could be running out of gas unless you know for sure it still has a half a tank?

Nov 10, 2010 | 1996 Dodge Ram 2500 Club Cab

1 Answer

Fuel gage drops to e after half tank fuel gage


Hi
Faulty fuel sender unit located inside fuel tank.

Regards
Phillip

Oct 16, 2009 | 2005 Chrysler Pacifica

1 Answer

My fuel gage is stuck at 3/4 of tank in my 84 chevy silverado


take the wire off that goes to the tank and ground it. if the Gage moves then it is the float if the Gage stays there then it is the Gage.

Mar 24, 2009 | 1984 Chevrolet Chevy

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

3 Answers

2001 Pontiac Montana Temperature Gage and Fuel Gage malfunction


sending unit or float in gas tank, check if any broken wires or well plugged in and then check the float for the gas.

Nov 02, 2008 | 2001 Pontiac Montana

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