![]() |
![]() |
#1 |
Registered User
Join Date: Apr 2010
Location: Canaan Ct
Posts: 105
|
Gas gauge blues
I sent out my gas gauge to be repaired and it still does not work. Just stays on empty. New wiring harness and a new sending unit. Power to the gauge and the sending unit is properly grounded. Any ideas????????????
|
![]() |
![]() |
![]() |
#2 |
Senior Member
![]() Join Date: Feb 2010
Location: Lambertville, MI
Posts: 1,860
|
Re: Gas gauge blues
Is there a ground at the tank? I dont know if there is supposed to be cuz my trucks apart.
|
![]() |
![]() |
![]() |
#3 |
Registered User
Join Date: Nov 2011
Location: fayetteville nc
Posts: 10,338
|
Re: Gas gauge blues
make sure you have the correct color wires on the guage. looking at the rear of the guage from left to right should be brown / pink
Posted via Mobile Device
__________________
1963 Short bed step side SBW 427 big block and borg warner T-16 HD 3 speed manual http://67-72chevytrucks.com/vboard/s...d.php?t=519869 1963 Short bed fleetside BBW 348 1st gen big block w/Powerglide http://67-72chevytrucks.com/vboard/s...d.php?t=619024 1964 Short bed trailer |
![]() |
![]() |
![]() |
#4 |
Registered User
Join Date: Apr 2010
Location: Canaan Ct
Posts: 105
|
Re: Gas gauge blues
Sending unit is grounded. Tested the sending unit with ohms meter and works properly. The wires on the back of the gauge are correct. I used a brand new wiring harness from Classic truck parts. By the way, the truck is a 61
|
![]() |
![]() |
![]() |
#5 |
Registered User
Join Date: Nov 2011
Location: fayetteville nc
Posts: 10,338
|
Re: Gas gauge blues
Did you get the fuel guage sorted out?
__________________
1963 Short bed step side SBW 427 big block and borg warner T-16 HD 3 speed manual http://67-72chevytrucks.com/vboard/s...d.php?t=519869 1963 Short bed fleetside BBW 348 1st gen big block w/Powerglide http://67-72chevytrucks.com/vboard/s...d.php?t=619024 1964 Short bed trailer |
![]() |
![]() |
![]() |
#6 |
Registered User
Join Date: Nov 2009
Location: Galt, Calif
Posts: 2,437
|
Re: Gas gauge blues
Have you tested the gauge, if and when you do use only 1.5 volts battery power or you will ruin gauge....if I remember this correctly, if I`m wrong somebody correct.
__________________
`64 C10 vortec 350/350/373 posi `69 RS/SS 350/350/308 `37 Ford 406/350/324 traclock `68 Dart 370/904/323 suregrip |
![]() |
![]() |
![]() |
#7 | |
Registered User
Join Date: Feb 2009
Location: southeasternfoothillsofusa
Posts: 1,557
|
![]() Quote:
Sam Last edited by luvbowties; 04-25-2013 at 09:14 AM. Reason: add info |
|
![]() |
![]() |
![]() |
#8 |
Registered User
Join Date: Oct 2012
Location: Sweden - Gävle
Posts: 76
|
Re: Gas gauge blues
When i was driving My 62 from Atlanta to Pensacola FL I had to give the gauge a classic movie "knock knock" and the needle jumped up. Probably stuck some how. It did work for me during that drive anyway (I had to do it after each stop)
This don't actually solve the issue but hopefully a hint! Posted via Mobile Device
__________________
Johnny G -----------Vehicles-------------- * Chevrolet C-10 Stepside 1962 * Audi A4 Avant Quattro TDI 2008 * Sachs Compact 50cc 1967 |
![]() |
![]() |
![]() |
#9 |
Registered User
Join Date: Apr 2010
Location: Canaan Ct
Posts: 105
|
Re: Gas gauge blues
The needle moves freely and when the key is on the needle goes to empty. Pink wire has 12 volts when key is on, brown wire is conected to the sending unit. The ground wire on the sending unit is grounded. I pulled the sending unit out of the tank and moved the float to full and empty with out any movment of the needle.
I'm thinking I still have a bad gauge. |
![]() |
![]() |
![]() |
#10 | |
Registered User
Join Date: Feb 2009
Location: southeasternfoothillsofusa
Posts: 1,557
|
![]() Quote:
Sam |
|
![]() |
![]() |
![]() |
#11 | |
Registered User
Join Date: Feb 2009
Location: southeasternfoothillsofusa
Posts: 1,557
|
![]() Quote:
HTH, Sam |
|
![]() |
![]() |
![]() |
#12 |
Registered User
Join Date: Apr 2010
Location: Canaan Ct
Posts: 105
|
Re: Gas gauge blues
Before I sent the gauge out for repair, I bench tested the gauge and sending unit with a 12 volt battery. I wired it up as if it was in the truck and moved the float. No movment of the needle. With no power, the needle moves freely and when power is added, the needle goes to E. I did the same test yesterday with the same results.
I tested the sending unit with a OHMs meter and it is working correctly. 30 OHMs of resistence when float is in the full position and 0 OHMs when in the empty position. This makes me believe I still have a bad gauge. |
![]() |
![]() |
![]() |
#13 |
Registered User
Join Date: Nov 2011
Location: fayetteville nc
Posts: 10,338
|
Re: Gas gauge blues
could be a bad resistor on the guage even if was replaced
Posted via Mobile Device
__________________
1963 Short bed step side SBW 427 big block and borg warner T-16 HD 3 speed manual http://67-72chevytrucks.com/vboard/s...d.php?t=519869 1963 Short bed fleetside BBW 348 1st gen big block w/Powerglide http://67-72chevytrucks.com/vboard/s...d.php?t=619024 1964 Short bed trailer |
![]() |
![]() |
![]() |
#14 |
Registered User
Join Date: Apr 2010
Location: Canaan Ct
Posts: 105
|
Re: Gas gauge blues
That is what I'm thinking, It was not replaced.
|
![]() |
![]() |
![]() |
#15 |
Registered User
Join Date: Apr 2010
Location: Canaan Ct
Posts: 105
|
Re: Gas gauge blues
Can anyone tell me what side of the gauge the pink wire is plugged into. On the Full side or the Empty side?
|
![]() |
![]() |
![]() |
#16 | |
Registered User
Join Date: Feb 2009
Location: southeasternfoothillsofusa
Posts: 1,557
|
![]() Quote:
Sam The gauge-to-sender-wire can cause 2 problems. If it is "open", the needle stays on E all the time; if it is shorted along its route to sender at tank, it reads F all the time. Temporarily running a dedicated wire from gauge to sender(like straight from gauge, across back of seat, and to the sender) will eliminate EITHER problem. You then know what to do! If problem persists after you have verified voltage to the + terminal, and run a dedicated wire, as described, to sender, then gauge is, as you apparently are already convinced, defective. In working on possibly 12-15 of these sixties-gauges over a number of years (from earliest in ~1975, to latest in ~2011), I've NEVER run across a bad gauge--just bad wiring, defective senders, and 'sinking' floats. In all these repairs, iirc I actually never bought a sender OR a float; all I recall were repairable, mainly curable via wire-repair or soldering. BUT I DON'T RECALL WORKING BEHIND AN EARLIER TRIAL-AND-ERROR EXPERIMENTER WHO COULD HAVE RUINED A GOOD GAUGE. Please do not think I am downgrading experimenters, as we all likely have learned untold info by doing so; but on electrical repairs, we can easily "smoke-test" a suspect component. *You may learn a lot from reading this thread shown below. It shows problems, symptoms, and fixes--many which have been explained on here already, but which may lend credence to induce you to follow some new tips or ones already offered:>> http://www.stovebolt.com/ubbthreads/...84552&page=all <<. Hang in there, keep us informed, and you 'and this forum' WILL get the problem turned into history! Last edited by luvbowties; 05-02-2013 at 08:09 PM. Reason: 'emboldened' 2 terms |
|
![]() |
![]() |
![]() |
#17 | |
Registered User
Join Date: Feb 2009
Location: southeasternfoothillsofusa
Posts: 1,557
|
![]() Quote:
SORRY FOR THE CONFUSION! Sam |
|
![]() |
![]() |
![]() |
#18 |
Registered User
Join Date: Apr 2010
Location: Canaan Ct
Posts: 105
|
Re: Gas gauge blues
I think I figured out my problem, I have a funny feeling the wires were backwards on the gauge. My pink wire is towards the center of the truck. I switched the wires and it still does not work. I'm thinking I must have damaged the gauge by having the wires crossed.
|
![]() |
![]() |
![]() |
#19 |
Who Me?
Join Date: Sep 2010
Location: Royal Palm Beach, FL
Posts: 4,067
|
Re: Gas gauge blues
Check the float in the tank. Mine had a hole in it and it sank to the bottom and stayed there.
__________________
![]() 1997 Tahoe LT 4D 2WD (DD) 2001 Blazer 4D 2WD 1961 Apache 10 (sold) 1965 C10 Stepper (sold) |
![]() |
![]() |
![]() |
#20 |
Registered User
Join Date: Apr 2010
Location: Canaan Ct
Posts: 105
|
Re: Gas gauge blues
I have a working gas gauge!!!!!!!!!!!!!!!!!! Bad ground between the gauge and the mounting plate. I took the gas gauge out of a 64 Chevy panel truck and tested it and it worked. Cleaned off where the gauge grounds on the backing plate on the original gauge and it works.
Thanks to all for there input and suggestions. Have a great week end. Tom |
![]() |
![]() |
![]() |
#21 |
But Found Her 25yrs Later!
![]() Join Date: Oct 2010
Location: Oregon City, Oregon
Posts: 10,525
|
Re: Gas gauge blues
I'm currently trying to track down my fuel gauge issues.
I still have to try some of the suggestions in this thread, but I figured I should ask what might be wrong with the gauge if it reads full all time, even with ignition off. The needle jumps ever so slightly when I turn on the ignition, but it always reads full even when the ignition is off.
__________________
I lost my 65 - Found it 25 years later: http://67-72chevytrucks.com/vboard/s...d.php?t=426650 66 C20 Service Truck: http://67-72chevytrucks.com/vboard/s...d.php?t=428035 |
![]() |
![]() |
![]() |
#22 | |
Registered User
Join Date: Feb 2009
Location: southeasternfoothillsofusa
Posts: 1,557
|
![]() Quote:
|
|
![]() |
![]() |
![]() |
Bookmarks |
|
|