Gas guage on 1953 belair HELP - The 1947 - Present Chevrolet & GMC Truck Message Board Network

oldblue1968chevy · 06-29-2011, 11:55 PM

New sending unit a few years ago.

Guage is almost always on full but sometimes jumps around..what the heck?

How could I figure out if the sending unit is no good, its a bad line (groundded somewere etc, or the guage is bad?)

thanks!

**N2TRUX** · 07-04-2011, 11:10 AM

Anyone?

**VetteVet** · 07-07-2011, 11:04 PM

The best way is to pull the sending unit out of the tank and test it with a volt meter. You should get between 0 and 30 ohms between the sender wire terminal and the mounting flange as you move the float arm up and down.

oldblue1968chevy · 07-07-2011, 11:09 PM

Not to sound like a smart aleck kid..lol

The sending unit came with the new tank approx 2 3 years ago and 'supposed' to work with either 6 or 12 volt systems (car is original 6 volt for time behing..)

Im thinking a bad wire...gas guage pegs F when you turn the key on....

**VetteVet** · 07-08-2011, 01:44 AM

If the sending unit wire is not connected to the gauge then you will get the symptoms you describe. Or if the sending unit is not grounded the same indications will occur. Try grounding the wire that goes to the sending unit terminal and see if the gauge drops to empty. It sounds like the ground side of the gauge is not connected because as you say, it may be a bad wire.

06-29-2011, 11:55 PM	#1
oldblue1968chevy Grandpa in the rustmobile... Join Date: Nov 2008 Location: Spokane WA/Viola TN Posts: 11,422	Gas guage on 1953 belair HELP New sending unit a few years ago. Guage is almost always on full but sometimes jumps around..what the heck? How could I figure out if the sending unit is no good, its a bad line (groundded somewere etc, or the guage is bad?) thanks! __________________ John Goose-1968 C10 355,9.32-1CR, Vortec Heads ,262 voodoo, 3.73:1 3OTT (HS ride/beater/farm truck) http://67-72chevytrucks.com/vboard/s...d.php?t=317684 Grams 53-1953 Chevrolet Belair http://67-72chevytrucks.com/vboard/s...=1#post4327784 1969 Chevy C10 Shortbed 4.5/6?" Frame off resto http://67-72chevytrucks.com/vboard/s...d.php?t=548136 1999 Toyota Tacoma 4x4

07-04-2011, 11:10 AM	#2
N2TRUX Happy to be here Join Date: Mar 2000 Location: Cypress, TX Posts: 39,023	Re: Gas guage on 1953 belair HELP Anyone? __________________ Follow me on Facebook and Instagram @N2trux.com Articles- "Jake" the 84 to 74 crewcab "Elwood" the77_Remix 85 GMC Sierra "Scarlett" "Refining Sierra"

07-07-2011, 11:04 PM	#3
VetteVet Msgt USAF Ret Join Date: Jan 2005 Location: Kalamazoo, Michigan Posts: 8,707	Re: Gas guage on 1953 belair HELP The best way is to pull the sending unit out of the tank and test it with a volt meter. You should get between 0 and 30 ohms between the sender wire terminal and the mounting flange as you move the float arm up and down. __________________ VetteVet metallic green 67 stepside 74 corvette convertible 1965 Harley sportster 1995 Harley wide glide Growing old is hell, but it beats the alternative.

07-07-2011, 11:09 PM	#4
oldblue1968chevy Grandpa in the rustmobile... Join Date: Nov 2008 Location: Spokane WA/Viola TN Posts: 11,422	Re: Gas guage on 1953 belair HELP Not to sound like a smart aleck kid..lol The sending unit came with the new tank approx 2 3 years ago and 'supposed' to work with either 6 or 12 volt systems (car is original 6 volt for time behing..) Im thinking a bad wire...gas guage pegs F when you turn the key on.... __________________ John Goose-1968 C10 355,9.32-1CR, Vortec Heads ,262 voodoo, 3.73:1 3OTT (HS ride/beater/farm truck) http://67-72chevytrucks.com/vboard/s...d.php?t=317684 Grams 53-1953 Chevrolet Belair http://67-72chevytrucks.com/vboard/s...=1#post4327784 1969 Chevy C10 Shortbed 4.5/6?" Frame off resto http://67-72chevytrucks.com/vboard/s...d.php?t=548136 1999 Toyota Tacoma 4x4

07-08-2011, 01:44 AM	#5
VetteVet Msgt USAF Ret Join Date: Jan 2005 Location: Kalamazoo, Michigan Posts: 8,707	Re: Gas guage on 1953 belair HELP If the sending unit wire is not connected to the gauge then you will get the symptoms you describe. Or if the sending unit is not grounded the same indications will occur. Try grounding the wire that goes to the sending unit terminal and see if the gauge drops to empty. It sounds like the ground side of the gauge is not connected because as you say, it may be a bad wire. __________________ VetteVet metallic green 67 stepside 74 corvette convertible 1965 Harley sportster 1995 Harley wide glide Growing old is hell, but it beats the alternative.



Register or Log In To remove these advertisements.

Register or Log In To remove these advertisements.