Old school auto instrument guy here, NEVER NEVER NEVER, connect any of these thermal gauges directly to ground. They operate on 5 volts NOT 12, at "Full" or "High" the resistance is 10 ohms through to Earth. If you run the gauge directly to Earth, the full 5 volts runs through the heating winding in the gauge and in just a few seconds it's curtains for the gauge. If you perform this test, use a 10 OHM resistor in line from earth to the gauge. NEVER NEVER NEVER connect the gauge directly to earth !
Great content, thanks for this video! My gauge was stuck all the way to the right past full. I dropped the tank and replaced the sending unit yesterday but my gauge is still stuck. I'm guessing I should check the fuse next? Maybe test the gauge itself somehow? Any insight would be greatly appreciated! Car is a 68 firebird. Thanks!
Good refresher video after not having to deal with this for a long time. I didn't really notice my accent until I left and now I hear it in others. From Maryland?
I have a 71 Chevelle I pulled the fuel tank and replaced the sending/float unit because the gauge would stick on fuel. I noticed that the stop tabs for fuel and empty were bent off to the side. When I pushed the float all the way up past the fuel tab it would stick there. So when I installed the new sending unit I did not bend the tabs. Now when the tank is full the gauge read between 3/4 and 1/2. Once the fuel gets down between 3/4 and 1/2 then the gauge works. Any ideas on what’s wrong?
I have a 1980 CJ5 with the fuel gauge and temp gauge inside the speedo cluster. When I turn my key, the gauge reads from below E to at E, and does not go past it. Any suggestions? I know I dropped a new sending unit in there, without checking the calibration. The temp gauge still works. The tank is a poly. Plus I will check the grounding wire on the sending unit.
What does it mean when gauge reads full and I changed out the fuel sending unit thinking that was the problem. And still have a full reading with a drained tank
When you apply a ground the gauge goes from empty to full, so I would ohm the wire to a ground on the car and see if it moves if it does then the wire is touching a ground somewhere if it’s ok then check your gauge
I filled up my 1968 mustang the other day it has an after market gauge that worked great but,I think filling it up all the way somehow made the float stuck any suggestions?
1977 Camaro. My gas gage always reads over full even when car is off and I understand that it could be grounded somewhere else but how can I check or where can I find where it is grounded at? Thanks
Thanks for your video. I have a 78 ford Thunderbird diamond jubilee, and my car have that problem, it doesn't show any fuel but I know there is some in. Do I can find the gas gauge at the autoparts, do they still have it?
I Have a question. Say if we ran the ground wire from the battery and the gauge did NOT move, what would be issue then? Since it would NOT be the sending unit
@@AutoRepairTips757 okay, want to start by saying thank you so much for the quick reply AND awesome video. To follow that up, how I check for the gauge itself? The fuse part should be easy. But this is my first time around the block so I just need a little direction. Thanks a lot man.
I have a 72 Oldsmobile Cutlass and my gas gauge needle is past the Full level all they way to the oil temperature indicator. I have a picture but it won't attach to my message
Ok so my fuel gauge only reads full when i turn the key. So does that mean its grounded? If so, do i then unplug the sending unit to see if the fuel guage drops?
any idea why my gauge wants to work sometimes and not work? everytime i fill the car its at full then as i start to drive it drops and then goes back up and does whatever it wants. Ill order the parts and replace it but i wish i could understand
..I am puzzled,..so you are applying 12v into that sensor (you call a ground wire) wire, turning the key and you say the guauge should go to full? ..am I to remove the 12v from my ignition prior? I have an brand new made in the USA auto meter fuel gauge, 3 terminals, ground, sensor, and ignition.
Old school auto instrument guy here, NEVER NEVER NEVER, connect any of these thermal gauges directly to ground. They operate on 5 volts NOT 12, at "Full" or "High" the resistance is 10 ohms through to Earth. If you run the gauge directly to Earth, the full 5 volts runs through the heating winding in the gauge and in just a few seconds it's curtains for the gauge. If you perform this test, use a 10 OHM resistor in line from earth to the gauge. NEVER NEVER NEVER connect the gauge directly to earth !
Awesome video! This guy is a hero. Straight to the point helping folks I love it
Thanks
15 years?? it looks amazing! great video..
thanks
Great content, thanks for this video! My gauge was stuck all the way to the right past full. I dropped the tank and replaced the sending unit yesterday but my gauge is still stuck. I'm guessing I should check the fuse next? Maybe test the gauge itself somehow? Any insight would be greatly appreciated! Car is a 68 firebird. Thanks!
Check the wire make sure it’s not short to ground because if it’s ground out somewhere along the way it’ll cause your gauge to read full
Good refresher video after not having to deal with this for a long time. I didn't really notice my accent until I left and now I hear it in others. From Maryland?
Close enough, Virginia
I have a 71 Chevelle
I pulled the fuel tank and replaced the sending/float unit because the gauge would stick on fuel.
I noticed that the stop tabs for fuel and empty were bent off to the side.
When I pushed the float all the way up past the fuel tab it would stick there.
So when I installed the new sending unit I did not bend the tabs.
Now when the tank is full the gauge read between 3/4 and 1/2.
Once the fuel gets down between 3/4 and 1/2 then the gauge works.
Any ideas on what’s wrong?
Are you running the ground wire from the battery all the way to the tank to test it?
Yes
@@AutoRepairTips757 Thank-you so much
Yes had this question too
@@dreamingcode Check your local auto parts store they should have a tool to get the gas out safely
I have a 1980 CJ5 with the fuel gauge and temp gauge inside the speedo cluster. When I turn my key, the gauge reads from below E to at E, and does not go past it. Any suggestions? I know I dropped a new sending unit in there, without checking the calibration. The temp gauge still works. The tank is a poly. Plus I will check the grounding wire on the sending unit.
I have a full tank of gas. Any way to get it out before crawling underneath my 64 falcon wagon?
Siphon it out.
Thanks for sharing
glad you liked it
What does it mean when gauge reads full and I changed out the fuel sending unit thinking that was the problem. And still have a full reading with a drained tank
When you apply a ground the gauge goes from empty to full, so I would ohm the wire to a ground on the car and see if it moves if it does then the wire is touching a ground somewhere if it’s ok then check your gauge
@@AutoRepairTips757 I’ll try that thank you!
I filled up my 1968 mustang the other day it has an after market gauge that worked great but,I think filling it up all the way somehow made the float stuck any suggestions?
Unplug it and run some test to narrow it down
What would be the best for a 1965 sending unit
1977 Camaro. My gas gage always reads over full even when car is off and I understand that it could be grounded somewhere else but how can I check or where can I find where it is grounded at? Thanks
When you unplug it at the tank what happens
@@AutoRepairTips757 when I unplug at the tank it doesn’t move, could the gage be stuck?
Thanks for your video. I have a 78 ford Thunderbird diamond jubilee, and my car have that problem, it doesn't show any fuel but I know there is some in. Do I can find the gas gauge at the autoparts, do they still have it?
I Have a question. Say if we ran the ground wire from the battery and the gauge did NOT move, what would be issue then? Since it would NOT be the sending unit
Check fuse, check for a bad wire and check the gauge itself.
@@AutoRepairTips757 okay, want to start by saying thank you so much for the quick reply AND awesome video. To follow that up, how I check for the gauge itself? The fuse part should be easy. But this is my first time around the block so I just need a little direction. Thanks a lot man.
No problem, you can check OHMS between the gauge and the wire at the sending unit.
My gas gadge in my 79 camaro works when I hit a bump and stops working when I hit another bump
I have a 72 Oldsmobile Cutlass and my gas gauge needle is past the Full level all they way to the oil temperature indicator. I have a picture but it won't attach to my message
Hopefully this works for my 78 camaro lol
my gauge goes from empty to past full in 20 seconds when i turn the key. is it not grounded? its a 12 volt aftermarket brothers truck part gauge
if you disconnect it at the sending unit what does it do
that wire connects from the battery all the way to the tank?
Yes
@@AutoRepairTips757 thanks for the reply
Ok so my fuel gauge only reads full when i turn the key. So does that mean its grounded? If so, do i then unplug the sending unit to see if the fuel guage drops?
if the wire that goes to the instrument cluster doesnt have any power what should i do ? Would the problem be the fuse?
what kind of car is it ?
@@AutoRepairTips757 68 mustang
Check the fuse first, if that’s ok then check for power and ground at the cluster
@@AutoRepairTips757 there’s power to the cluster but not to the wire in the back, I also changed the fuse and it still doesn’t work
Did you have to drop the tank to replace unit?
No
What size wheels/tires does the car in the video have?
When I get to work I’ll check my older repair order and see what size we put on
@@AutoRepairTips757 Thanks, they look great :)
@@magnussjostrand6518 I cannot find the wheel size in my old repair orders the next time the customer comes bye I’ll try to get that information sorry
@@AutoRepairTips757 No worries, thanks for looking :)
any idea why my gauge wants to work sometimes and not work? everytime i fill the car its at full then as i start to drive it drops and then goes back up and does whatever it wants. Ill order the parts and replace it but i wish i could understand
What kind of car do you have
@@AutoRepairTips757 72 chevelle
@@unknown-co3hu email me at autorepairtips@gmail.com and i will send you some info
@@AutoRepairTips757 great video! I have 77 Datsun 280z 2+2 would it be similar to what you showed in video?
@@katyazelaya-hayes4561 email me at autorepairtips@gmail.com and i can send you wiring schematic
How much does that cost?
About 150.00 parts and labor
Why is my S10 staying on full
..I am puzzled,..so you are applying 12v into that sensor (you call a ground wire) wire, turning the key and you say the guauge should go to full?
..am I to remove the 12v from my ignition prior? I have an brand new made in the USA auto meter fuel gauge, 3 terminals, ground, sensor, and ignition.
You loosened ant tightend the retainer ring in the same direction for both.... Doesnt make sense
Mine reads full all the time
If you unplug the sending unit what happens
Your skin is like leather im dying 😭 lol
Without looking at the video I know its the float.