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Apr 26th, 2026 | | AD Chevy Trucks  Over 6,000 pictures Brad Allen has an awesome collection of Chevrolet factory pictures that he has set up from film strips. Check them out!
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| | | | Joined: Sep 2005 Posts: 20 Apprentice | | Apprentice Joined: Sep 2005 Posts: 20 | I have installed a new 12 volt gas guage in the old truck . The previous guage was 6 volt with a resister connected to it. Here is my question . Do I need to remove the resister for the guage to operate correctly ? | | | | | Joined: May 2005 Posts: 1,624 Shop Shark | | Shop Shark Joined: May 2005 Posts: 1,624 | If your system is 12 volts and you have installed a 12 volt gauge I would not think a resistor is needed in the supply line of your gauge.
Six volt guy living in a twelve volt world
| | | | | Joined: Dec 2006 Posts: 720 'Bolter | | 'Bolter Joined: Dec 2006 Posts: 720 | You wont need the resistor, but you'll need to see what the operating voltage and Ohm range on your fuel tank sender is. Might work, might not, good thing is 12V replacment senders aren't all that spendy.
1956 GMC 370 dump " 'Tater "1970 VW Volksrod "the Black Bomber" 2007 Chevy Avalanche 2020 Jeep Cherokee Trailhawk, 2005 Harley Davidson FLHTCUI I dig all cars, old and new, whether they were hammered out of American iron, German steel, or Japanese tin cans. Being unable to appreciate them all is missing out on a world of great things.
But thats just MY opinion! :P
| | | | | Joined: Mar 2005 Posts: 1,029 Member | | Member Joined: Mar 2005 Posts: 1,029 | The only difference in the sending units is whether they are 90 Ohm or 30 Ohm, voltage is immaterial. The gauge itself is the only thing that's voltage sensitive. | | | | | Joined: Jul 2004 Posts: 5,708 'Bolter | | 'Bolter Joined: Jul 2004 Posts: 5,708 | My wife thinks I'm insensitive and immaterial too! I wonder if I'm a sending unit?  Stuart | | | | | Joined: Mar 2005 Posts: 1,029 Member | | Member Joined: Mar 2005 Posts: 1,029 | No, you're just a normal male with a normal wife if my getting the same thing from mine is a sufficient statistical sample. | | | | | Joined: Mar 2005 Posts: 1,029 Member | | Member Joined: Mar 2005 Posts: 1,029 | Freq2002 is correct in that the new gauge is unlikely have the same Ohm range as the old sending unit and will not be accurate. | | |
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