gas gauge troubleshooting - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Dandeluxe · 04-01-2002, 08:17 PM

i put my dash back in after swapping from a reg. gauge dash to a dash with a tach in it. but now i found my gas gauge doesnt work. should i try putting in the other gas gauge that worked in the other dash or is there a way to troubleshoot it. maybe the circuit board is bad. ??????

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1969 cst swb 350/400 th DANNY C. ddclux@aol.com st. louis mo.
for pic.s go to http://community.webshots.com/user/dandeluxeGO TO Fotki. com for public pic.s under DANDELUXE

71GMC_3/4T · 04-01-2002, 08:26 PM

Find the brown wire that comes out of the upper right corner of the fuse box. That's your fuel gauge wire. Make sure it's connected to the fuse box.
Now pull the wire off the sender at the tank. Your gauge should go to way over full if it's working (with the key on). If you short the wire to ground, the gauge should go to empty. If it won't exhibit either of these tendencies, pull the connector off the back of your new instrument panel and clean it and the contacts on the flex-circuit. Don't scrape them but use a soft pencil eraser instead. If all else fails, try swapping just your old fuel gauge back in. It might just be toast, but that isn't too common.

[This message has been edited by 71GMC_3/4T (edited April 01, 2002).]

[This message has been edited by 71GMC_3/4T (edited April 01, 2002).]

**Tim Christian** · 04-01-2002, 09:24 PM

Does it read full or empty?

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67 GMC Stepside(UNDER CONSTRUCTION)
67 GMC Custom
67 Chevy C-30

Dandeluxe · 04-01-2002, 10:31 PM

Tim, it reads stuck at between 5/8 and 3/4

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1969 cst swb 350/400 th DANNY C. ddclux@aol.com st. louis mo.
for pic.s go to http://community.webshots.com/user/dandeluxeGO TO Fotki. com for public pic.s under DANDELUXE

Longhorn Man · 04-01-2002, 10:34 PM

Then most likely you are not getting voltage to the guage its self. The brown wire is kinda like the ground...the more ground it gets, the more the needle moves. Howeve, if it is getting no power, the needle won't move no matter what you do with the ground.
Pull the inst panel and look at the printed circuit. I had to repair mine on the GMC...pretty easy really.

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'69 G.M.C. 350/350. Trying to clean up the left over damage from the Dope-Smokin-Old-Man
I've been dubbed the Longhorn Freak/Fanatic/Expert, I just hope I can live up to it.
FINALLY got the HORNIAC...a '70 one ton Longhorn with a Pontiac 350/350 and lots of 'personality'. Check out The Longhorn Webite.
If you need a pic posted, E-mail me at longhornmail@yahoo.com
Andy, in Columbus Ohio

O'l Buck · 04-02-2002, 02:41 AM

you might check an make sure the printed circuit is the same beween the 2 panels, I've never seen a tach dash, but they might use a different plug with contacts in different places.

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'72 Chevy 1/2T 4x4 shortbox stepside 350/350auto on '84
ralleys and 31/10.5s

67 Cutlass convertible
330, 3spd stick

90 GMC Jimmy
350/auto
Chad Stephens
Orleans,NE

04-01-2002, 08:17 PM	#1
Dandeluxe Senior Member Join Date: Nov 2001 Location: st.louis mo. Posts: 717	gas gauge troubleshooting i put my dash back in after swapping from a reg. gauge dash to a dash with a tach in it. but now i found my gas gauge doesnt work. should i try putting in the other gas gauge that worked in the other dash or is there a way to troubleshoot it. maybe the circuit board is bad. ?????? ------------------ 1969 cst swb 350/400 th DANNY C. ddclux@aol.com st. louis mo. for pic.s go to http://community.webshots.com/user/dandeluxeGO TO Fotki. com for public pic.s under DANDELUXE __________________ 1969 cst swb 350/400 th . DANNY C . ["]FRIENDS DONT LET FRIENDS DRIVE F@RD$!! 1969 cst swb corvette hugger orange with 400 hp sbc I started out with nothing and i held on to it

04-01-2002, 08:26 PM	#2
71GMC_3/4T Weapons Of Construction Join Date: Apr 2000 Location: Colorado, USA Posts: 1,095	Find the brown wire that comes out of the upper right corner of the fuse box. That's your fuel gauge wire. Make sure it's connected to the fuse box. Now pull the wire off the sender at the tank. Your gauge should go to way over full if it's working (with the key on). If you short the wire to ground, the gauge should go to empty. If it won't exhibit either of these tendencies, pull the connector off the back of your new instrument panel and clean it and the contacts on the flex-circuit. Don't scrape them but use a soft pencil eraser instead. If all else fails, try swapping just your old fuel gauge back in. It might just be toast, but that isn't too common. [This message has been edited by 71GMC_3/4T (edited April 01, 2002).] [This message has been edited by 71GMC_3/4T (edited April 01, 2002).] __________________ 1971 GMC 2500, 402/TH400 4.10 Daily Driver Lafayette, CO

04-01-2002, 10:31 PM	#4
Dandeluxe Senior Member Join Date: Nov 2001 Location: st.louis mo. Posts: 717	Tim, it reads stuck at between 5/8 and 3/4 ------------------ 1969 cst swb 350/400 th DANNY C. ddclux@aol.com st. louis mo. for pic.s go to http://community.webshots.com/user/dandeluxeGO TO Fotki. com for public pic.s under DANDELUXE __________________ 1969 cst swb 350/400 th . DANNY C . ["]FRIENDS DONT LET FRIENDS DRIVE F@RD$!! 1969 cst swb corvette hugger orange with 400 hp sbc I started out with nothing and i held on to it

04-02-2002, 02:41 AM	#6
O'l Buck Recovering Truck Driver Join Date: Mar 2002 Location: Orleans, NE USA Posts: 1,883	you might check an make sure the printed circuit is the same beween the 2 panels, I've never seen a tach dash, but they might use a different plug with contacts in different places. ------------------ '72 Chevy 1/2T 4x4 shortbox stepside 350/350auto on '84 ralleys and 31/10.5s 67 Cutlass convertible 330, 3spd stick 90 GMC Jimmy 350/auto Chad Stephens Orleans,NE __________________ 67 K-20 350, SM465, Eaton rear, 4.56 no spin option 00 Dodge 2500 4x4, 24V cummins, 5 speed Chad South Central Nebraska

04-01-2002, 09:24 PM	#3
Tim Christian Senior Member Join Date: Dec 1999 Location: TN/VA Posts: 6,389	Does it read full or empty? ------------------ 67 GMC Stepside(UNDER CONSTRUCTION) 67 GMC Custom 67 Chevy C-30

04-01-2002, 10:34 PM	#5
Longhorn Man its all about the +6 inches Join Date: Jan 2001 Location: Hilliard Ohio Posts: 2,690	Then most likely you are not getting voltage to the guage its self. The brown wire is kinda like the ground...the more ground it gets, the more the needle moves. Howeve, if it is getting no power, the needle won't move no matter what you do with the ground. Pull the inst panel and look at the printed circuit. I had to repair mine on the GMC...pretty easy really. ------------------ '69 G.M.C. 350/350. Trying to clean up the left over damage from the Dope-Smokin-Old-Man I've been dubbed the Longhorn Freak/Fanatic/Expert, I just hope I can live up to it. FINALLY got the HORNIAC...a '70 one ton Longhorn with a Pontiac 350/350 and lots of 'personality'. Check out The Longhorn Webite. If you need a pic posted, E-mail me at longhornmail@yahoo.com Andy, in Columbus Ohio



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