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01-14-2014, 11:34 PM
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#1 |
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Registered User
Join Date: Sep 2008
Location: Burnsville
Posts: 70
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Gas gauge question
So when I pulled my wiring I forgot to see how the gas gauge was wired. It worked when it was in before I pulled it.
My first question is how exactly is it wired to power and the sender unit? And is thier a way to find out if I may have blown the gauge? I'm running 12volts and it worked before I pulled it just don't know if I could have wired it wrong and blew the gauge? Thanks! |
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01-15-2014, 12:45 AM
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#2 |
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Registered User
Join Date: Jun 2006
Location: Idaho
Posts: 8,800
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Re: Gas gauge question
12v goes to one side of the gauge. other side goes to the sending unit, with is a variable ground. Did you change the tank and sending unit?
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1959 Chevy Short Fleetside w/ 74 4WD drive train (current project) OrrieG Build Thread 1964 Chevelle Malibu w/ 355-350TH (daily driver) Helpful AD and TF Manual Site Old Car Manual Project |
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01-15-2014, 12:47 AM
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#3 |
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Registered User
 
Join Date: Jul 2007
Location: Toppenish, WA
Posts: 15,705
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Re: Gas gauge question
Well it doesn't "power" the sending unit. The resistor in the sending unit changes the resistance between the gauge and the ground Usually there is a wire running from the gauge to the sending unit and the sending unit is grounded to the tank or has a ground wire running to a good ground.
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Founding member of the too many projects, too little time and money club. My ongoing truck projects: 48 Chev 3100 that will run a 292 Six. 71 GMC 2500 that is getting a Cad 500 transplant. 77 C 30 dualie, 454, 4 speed with a 10 foot flatbed and hoist. It does the heavy work and hauls the projects around. |
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01-15-2014, 01:14 AM
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#4 | |
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Registered User
Join Date: Jan 2012
Location: Motown
Posts: 7,680
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Re: Gas gauge question
Quote:
 it is a potentiometer
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cool, an ogre smiley Ogre's 58 Truk buildhow to put your truck year and build thread into your signature shop air compressor timer |
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01-15-2014, 10:25 AM
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#5 |
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Registered User
Join Date: Dec 2011
Location: Moxee WA
Posts: 1,482
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Re: Gas gauge question
Looking at the face of the guage, power comes from the key to the left terminal. Then from the right terminal to the sending unit. You must use a resistor to drop from 12 v to
6 v. it goes on the power in side. Good luck |
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01-15-2014, 03:50 PM
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#6 |
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Registered User
Join Date: May 2010
Location: Lawrenceville, Ga
Posts: 2,648
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Re: Gas gauge question
I can't remember if you have a TF or AD, but if it's a TF you don't reduce the voltage to the gauges. The gas gauge should have switched 12V applied.
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01-16-2014, 03:56 PM
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#7 |
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Registered User
Join Date: Sep 2008
Location: Burnsville
Posts: 70
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Re: Gas gauge question
Thanks for all the great info. I researched on how the gauge works just wasn't sure which side each one goes on. Looks like il have to double check my work and grounds. An by the way it is a advance design
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