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03-17-2018, 07:48 PM
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#1 |
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Registered User
Join Date: Aug 2016
Location: Danville Wv
Posts: 266
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Gas Guage
Replaced the sending unit in my gas tank and needle will set on 3/4 of a tank turn the key on and roll over to almost E. Any tips on how to fix this.
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03-17-2018, 07:53 PM
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#2 |
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Registered User
Join Date: Nov 2014
Location: Lincoln City DE
Posts: 1,292
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Re: Gas Guage
ground to frame
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Stan 67 swb BLU MULE posted via flip-fone |
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03-17-2018, 08:21 PM
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#3 |
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Registered User
Join Date: Aug 2016
Location: Danville Wv
Posts: 266
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Re: Gas Guage
So the brown wire going to the sending unit needs to be placed elsewhere?
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03-17-2018, 09:05 PM
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#4 |
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Registered User
Join Date: Nov 2014
Location: Lincoln City DE
Posts: 1,292
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Re: Gas Guage
If you pull the brown wire off of the fuse panel where it says FUEL, the gauge should go past full to the three o'clock reading . If you pull the brown wire off at the sending unit and touch it to a good ground then the gauge should read empty. The fuel tank completes the circuit back to the battery for the negative side and it must be grounded to the frame and the sending unit flange must be grounded to the tank.
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Stan 67 swb BLU MULE posted via flip-fone |
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03-18-2018, 11:53 AM
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#5 | |
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Cluster King
 
Join Date: Nov 2012
Location: Junction City, OR
Posts: 5,263
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Re: Gas Guage
Quote:
Has anyone restored the gauge cluster or has the needle been removed from the fuel gauge that you know of? Check your new fuel sender for proper ohm reading of 0-90 ohms.o on empty, 90 on full. You may get a little more than 90 on a full sweep but that is OK. Remove your resistor from the gauge and ohm check. You should have somewhere between 85 and 95 ohms. Wiring, like others have mentioned, you need good ground to the sender, not to the tank. The sender is isolated from the tank by a rubber o ring and will not get a ground unless it is grounded to the sender itself. Signal wire, from sender to fuse panel is tan. This wire also runs from the fuse panel to the cluster connector (through the under dash harness) at the #4 position. From there it runs through the circuit board to the gauge. Make sure there is no paint on the tins that separate the gauge to the cluster body. Never trust new aftermarket parts to be good right out of the box. They have got better but not 100%. Let me know if you need further help with this. Tom I can repair or replace your fuel gauge if needed.
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Contact me on all of your gauge cluster needs. I specialize in restoration, repair and parts sales for 67-72 Chevy and GMC trucks. email me at tbonegarris@yahoo.com I am also a dealer for Counterpart for gauge cluster parts only. Also see my facebook page, CG&C |
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03-18-2018, 02:22 PM
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#6 |
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Registered User
Join Date: Aug 2016
Location: Danville Wv
Posts: 266
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Re: Gas Guage
Guages have not been tampered with as far as I know. The sending unit was bought from classic truck parts. I replaced the new oring between the tank and unit. I have a lock washer a nut and a cork/rubber washer. In what order should these be put together on the sending unit with the tan wire? Or does it matter?
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