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#1 |
Registered User
Join Date: Sep 2002
Location: Austin, Texas
Posts: 1,048
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Need help with gas gauge
I've replaced my sending unit and gas gauge - still not working. The sending unit is good because I tested it with an autometer gas gauge and it works. Circuit board seems to be intact too.
What am I missing?
__________________
72 Cheyenne SWB C10 (daily driver) (Super fake cause I just love the glovebox emblem) 70 Camaro RS (frame-off in pieces) 70 Camaro RS (daily driver backup) 69 Custom LWB C10 (son now drives) |
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#2 |
its all about the +6 inches
Join Date: Jan 2001
Location: Hilliard Ohio
Posts: 2,693
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What is it doing? Is it stuck on past full, below empty, or is it stuck some where inbetween E and F?
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#3 |
Registered User
Join Date: Sep 2002
Location: Austin, Texas
Posts: 1,048
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It's on below empty. I haven't seen it move at all
__________________
72 Cheyenne SWB C10 (daily driver) (Super fake cause I just love the glovebox emblem) 70 Camaro RS (frame-off in pieces) 70 Camaro RS (daily driver backup) 69 Custom LWB C10 (son now drives) |
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#4 |
its all about the +6 inches
Join Date: Jan 2001
Location: Hilliard Ohio
Posts: 2,693
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Inspect teh brown wire going from the tank to the fuse box. Look for corrosion/cuts anyplace along it.
It goes under the chrome trim at the bottom of the door. This is a real good place fore wires to get messed up with water which leads to corrosion. |
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#5 |
Registered User
Join Date: Sep 2002
Location: Austin, Texas
Posts: 1,048
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I checked that wire- its good. That's the wire I used to plug into my working aftermarket gauge.
__________________
72 Cheyenne SWB C10 (daily driver) (Super fake cause I just love the glovebox emblem) 70 Camaro RS (frame-off in pieces) 70 Camaro RS (daily driver backup) 69 Custom LWB C10 (son now drives) |
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#6 |
its all about the +6 inches
Join Date: Jan 2001
Location: Hilliard Ohio
Posts: 2,693
|
Well if the wire is good, then there is a problem with the sending unit. That's the only thing left in the system.
Where and when did you get it? |
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#7 |
Registered User
Join Date: Sep 2002
Location: Austin, Texas
Posts: 1,048
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Classic Industries. It's only a few months old. My aftermarket gauge works fine though.
I have a buddy with a 67, guess I could borrow his cluster and see if it'll work. Not sure if the wiring is the same.
__________________
72 Cheyenne SWB C10 (daily driver) (Super fake cause I just love the glovebox emblem) 70 Camaro RS (frame-off in pieces) 70 Camaro RS (daily driver backup) 69 Custom LWB C10 (son now drives) |
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#8 |
its all about the +6 inches
Join Date: Jan 2001
Location: Hilliard Ohio
Posts: 2,693
|
As long as they are the same set up...as in dummy light inst panel and dummy light or guage type and guage type. Don't try to swap one for the other...that'll fry the fuel guage if it is any good.
Double checking the circuit board would be a good step...but swapping it out would eliminate that. (I just re-read your original post...I thought you said that the circuit board was new) |
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#9 |
Registered User
Join Date: Sep 2002
Location: Austin, Texas
Posts: 1,048
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Thanks for the help!
__________________
72 Cheyenne SWB C10 (daily driver) (Super fake cause I just love the glovebox emblem) 70 Camaro RS (frame-off in pieces) 70 Camaro RS (daily driver backup) 69 Custom LWB C10 (son now drives) |
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#10 |
Registered User
Join Date: Jul 2002
Location: Ventura, Ca.
Posts: 87
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Don't rule out the gas guage. I had the same exact problem with mine. I pulled the sending unit out and decided to replace it since the screen was thrashed and thought that would do the trick. I also checked all of the wiring and that was good, so the only thing that was left was the guage. I bought a new one from LMC and threw it in expecting everything to work and it didn't. I was pissed! I knew it was the guage. I needed it bad because I was packing to leave in 2 days for a fishing trip and a 6 hour drive. This drive has very few gas stations along the way, so a functional gas gauge was a must. I called a local shop, Brothers, here in SoCal that specializes in our trucks and had them send me a new gauge next day air. I got it and it worked! Thanks Brothers! I will never buy anything from LMC again. This isn't the first time I've had a problem with LMC. Good luck.
__________________
Aaron Ventura, Ca. 1972 GMC Super Custom SB350/TH400 |
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#11 |
its all about the +6 inches
Join Date: Jan 2001
Location: Hilliard Ohio
Posts: 2,693
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I was thinking about this thread today at work and I didn't mention anything about the guage...
It is not real common, but it does happen. |
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#12 |
Registered User
Join Date: Apr 2003
Location: Garland, Texas
Posts: 1,127
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mines stuck past full...any ideas?
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#13 | |
Registered User
Join Date: Apr 2003
Location: Deville, Louisiana
Posts: 293
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Quote:
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1972 GMC SWB, 305 powered 1980 diesel VW pickup, Needs a Heart Transplant 1997 Toyota Taco The Second Amendment is in place incase they ignore the others. |
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#14 |
Registered User
Join Date: Apr 2003
Location: missouri city, tx
Posts: 4,486
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mine is way past full too. anybody else with us?
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70 longbed 496/th400/Ford 9" |
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#15 |
Registered User
Join Date: Sep 2002
Location: Austin, Texas
Posts: 1,048
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Man! I guess I uncovered an epidemic.
Are there any other wires that hook up directly to the gas gauge? Is the standard harness plug all there is? I ran a splice from the brown wire in the harness plug to my aftermarket gauge and it works. So I'm getting a signal from the tank - to the fuse block - to the wiring harness - but the gauge is not responding. Gotta be the gauge, right?
__________________
72 Cheyenne SWB C10 (daily driver) (Super fake cause I just love the glovebox emblem) 70 Camaro RS (frame-off in pieces) 70 Camaro RS (daily driver backup) 69 Custom LWB C10 (son now drives) Last edited by 9teen69; 05-19-2003 at 09:28 PM. |
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#16 |
Registered User
Join Date: Apr 2003
Location: Garland, Texas
Posts: 1,127
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I thought it was great...untill i noticed it wasn't goin down. "WOW!! I've got like 3 tanks of gas compressed into my one. I HAVE A GAS PRODUCING TRUCK!!" man if only my dreams came true.
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#17 |
Got 20's????
Join Date: Oct 2001
Location: Aberdeen SD
Posts: 1,451
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My printed circuit fried on my truck. One of the bars going to the fuel guage burned up and it also took out my temp guage. I tried soldering a wire on to jump over the burned spot, but it still doesn't work. Any help??? And my needle goes way past full. Thanks
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99 Silverado Ex-Cab 2wd, Bagged&WhippleCharged 02 Sierra Ex-Cab 4wd 2500 HD The 72 went down the road. |
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#18 |
its all about the +6 inches
Join Date: Jan 2001
Location: Hilliard Ohio
Posts: 2,693
|
If the needle is way past full, then that brown wire is probably grounded out. The fact that it goes past full will prove that the guage and everything else is good. Just find the grounded portion of the brown wire and then hope the sending unit its self is good.
Again, under the chrome trim is the #1 place for the offending damage. |
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#19 |
Registered User
Join Date: Apr 2003
Location: Garland, Texas
Posts: 1,127
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i'll check that as soon as possible...so much for my gas producing truck
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#20 |
its all about the +6 inches
Join Date: Jan 2001
Location: Hilliard Ohio
Posts: 2,693
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I produce gas...just ask my wife.
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#21 |
Space Cadet
Join Date: Mar 2003
Location: Twin Cities
Posts: 132
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9teen69, maybe your fuel gauge reads empty 'cause you're out of gas... seriously. I do stuff like that all the time.
my gauge doesn't work either, because the brown wire, that's supposed to be down by some chrome trim (which I don't have), has disappeared along with half of the floor! |
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#22 |
Registered User
Join Date: Sep 2002
Location: Austin, Texas
Posts: 1,048
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I'm a redneck but not that red. It is sitting way past empty. Thanks for the help. I'm going to borrow another cluster gauge from a buddies working truck. If that works I'll know the new is no good, I'll also try swapping out the circuit board.
__________________
72 Cheyenne SWB C10 (daily driver) (Super fake cause I just love the glovebox emblem) 70 Camaro RS (frame-off in pieces) 70 Camaro RS (daily driver backup) 69 Custom LWB C10 (son now drives) |
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#23 |
Registered User
Join Date: Feb 2002
Location: orange, tx usa
Posts: 167
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Ive replaced my metal float 3 times. It seems to crack at the seam . Anybody know who might make a plastic float ? Or maybe a good metal float ?
Guy
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guypm 1971 SWB Fleetside/350 performer rpm heads &intake/ holley 750dp/1.5roller rockers/MSD6a/700r4 1650stall/one piece driveshaft/3.73 open/dynomax ceramic coated headers/3chamber flowmasters/ |
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#24 |
its all about the +6 inches
Join Date: Jan 2001
Location: Hilliard Ohio
Posts: 2,693
|
You could put a cork float on it. Just make sure you finish drinking the bottle of wine before you donate the cork to your truck.
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#25 |
Registered User
Join Date: Sep 2002
Location: Austin, Texas
Posts: 1,048
|
My sending unit has to be good because it works with the aftermarket gauge. I used 2 different gauges from a friends truck and it still doens't work. When the aftermarket gauge isn't grounded good it doesn't work.
Is there a ground wire somewhere I'm missing?!# ![]()
__________________
72 Cheyenne SWB C10 (daily driver) (Super fake cause I just love the glovebox emblem) 70 Camaro RS (frame-off in pieces) 70 Camaro RS (daily driver backup) 69 Custom LWB C10 (son now drives) |
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