Questions & Answers
Questions: I purchased this gauge and did not come with a light there is a hole for it, no socket . What would I have to do to get this bulb and socket
Question By: Randy hoagland on Nov 30 2021 10:38 PM
They were not back lit. The dash used a protruding dash light part number: 640284
Answer By: Willys Jeep Parts Tech on Dec 1 2021 6:38 AM
Questions: When the tank is full the gauge reads empty. When the tank is empty it reads full?
Question By: Chris Sours on Nov 20 2021 8:47 PM
Sounds like a bad sending unit that is reading backwards. We test our prior to being sent out.
Answer By: Willys Jeep Parts Tech on Nov 22 2021 5:58 AM
Questions: gauge 640763-12v come with light sistem.
Question By: osvaldo algarin on Aug 1 2021 10:41 AM
They used a protruding dash light originally which we have as well.
Answer By: Willys Jeep Parts Tech on Aug 2 2021 5:57 AM
Questions: I hooked up my gauge and it seems to be working fine but the back of it got very warm and i think i seen a little smoke . Does it have to be grounded ?
Question By: arnold franz on Jul 29 2021 8:20 PM
Yes, you may have arched it. I would check your wires. Let us know.
Answer By: Willys Jeep Parts Tech on Jul 30 2021 6:43 AM
Questions: When I hook up the power and sensor wire to this gauge, it works properly. When I hook up the ground, the gauge goes to empty. Why doesn’t this work right without the ground?
Question By: Dan Rogers on Jul 15 2021 12:58 AM
You have to have a good ground for it to work right. I would check your sending unit as well. Email firstname.lastname@example.org to help.
Answer By: Willys Jeep Parts Tech on Jul 15 2021 5:48 AM
Questions: can you adjust the ohm with the adjustment screw?
Question By: Paul Pratt on Jan 13 2021 11:50 PM
Yes, there is a fine tune with a small flat head screw driver on the back.
Answer By: Willys Jeep Parts Tech on Jan 14 2021 5:27 AM
Questions: Hello, I need to know if you have the same Item (Fuel Gauge) with withe face and crome bezel. Thanks. I will be waiting for your answer.
Question By: German Serres on Aug 31 2020 5:26 PM
Sorry, these are not made with a chrome bezel
Answer By: Willys Jeep Parts Tech on Aug 31 2020 11:54 AM
Questions: The hole in the back of the gauge, is this to adjust the needle sweep position? If the fuel sending unit on empty reads high, how does adjustment work?
Question By: Aaron Maynard on May 26 2020 4:30 PM
These is a small slot for a needle nose screw driver for fine adjustment.
Answer By: Willys Jeep Parts Tech on May 26 2020 10:29 AM
Questions: The fuel gage I purchased from you didn’t have install directions. If I al looking st the back of the gage the top left terminal has a B above it. The right term has a T above it. At the bottom there is a screw with 3 lines below it, then a terminal and another screw to the right and it says 12v. My old gage had only 2 terminals. 1 went to sending unit and the other to the positive of the ignition. Can you tell me what needs to be hooked up where?
Question By: David evans on Apr 19 2020 7:55 PM
The + post is to ignition. The - post is to ground and the S post is to sender. You can also email email@example.com for help.
Answer By: Willys Jeep Parts Tech on Apr 20 2020 5:51 AM
Questions: I have (6hole) sending unit 914850 and this gauge 640763-12v. The sending unit looks fine going from 10 ohms full to 74 ohms empty. When I move the sending unit arm from full to empty, the gauge only moves from 3/4 to 1/2 (not enough motion). I can turn the screw in the back of the gauge to get the needle to move up or down but the range of motion under full range sender motion does not change. Is there another screw on the gauge that would increase its gain? I noticed that the 5 screw sending unit goes from 8 ohms to 135 ohms empty. That would probably make the needle move more. Any idea how to make this work? Thanks.
Question By: Richard Horth on Mar 8 2020 8:58 PM
The back of the gauge in the dash is a bit adjustable on the ohms. If you can email firstname.lastname@example.org to help out.
Answer By: Willys Jeep Parts Tech on Mar 9 2020 10:49 AM
Questions: WILL 640763-12V GAS GUAGE WORK WITH SENDER 914848 .IF NOT DO YOU HAVE THAT STILE GUAGE THAT WILL THANK YOU
Question By: Mark Oberender on Feb 21 2019 1:50 AM
Please email email@example.com your vehicle information so i know what kind of gauges you have and we can help. Thanks!
Answer By: Willys Jeep Parts Tech on Feb 21 2019 5:47 AM
Questions: Which terminal on the ignition switch does the positive+ lead from fuel gauge attach to?
Question By: Mark Brisby on Oct 12 2018 2:25 PM
Here's how to wire the ignition switch that matches this gauge: IGN> to coil BAT> + to Battery Acc> and accessories that need power such as heater, radio, ect ST> to starter/starter solenoid Thanks
Answer By: Willys Jeep Parts Tech on Oct 15 2018 8:28 AM
Questions: Hi I hav changed my 42 to 12volt ,if I buy this gauge do i need a new sender
Question By: Warren Jeffery on Oct 23 2017 4:38 AM
A1292 would be correct. It reads resistance.
Answer By: Willys Jeep Parts Tech on Oct 23 2017 5:55 AM
Questions: Can you supply mounting instructions for fuel gauge 64073-12V Thanks
Question By: Tom Beaudin on Jun 11 2017 12:04 PM
The gauge is marked on the back. + for power thru ignition - to ground and 's' for sender in tank.
Answer By: Willys Jeep Parts Tech on Jun 12 2017 5:42 AM
Questions: Will this work with sending unit 914850?
Question By: Mike on Jan 6 2017 4:39 PM
Yes, I do believe these have the same ohms readings. Typically the CJ-5 used a speedometer: 914845.
Answer By: Willys Jeep parts Tech on Jan 6 2017 9:18 AM
Questions: Looking for fuel guage for '49 truck
Question By: John Stackpole on Oct 4 2016 6:07 PM
That would be available good used only. Please call us toll free. We can try to help out.
Answer By: Willys Jeep Parts Tech on Oct 4 2016 11:11 AM
Questions: do you have or know where I can get a 12 volt dash unit compatible with a sending unit that runs between 0 and 137 ohms?
Question By: jerry boltz on Aug 25 2016 9:05 PM
Please call us toll free. We need to get more vehicle info from you.
Answer By: Willys Jeep Parts Tech on Aug 29 2016 5:43 AM
Questions: Does it have a light in it for night use?
Question By: Dick Connole on Jul 21 2016 5:33 PM
No they never used one originally. They had a dash light part number: 640284
Answer By: Willys Jeep Parts Tech on Jul 21 2016 11:32 AM
Questions: What is the Ohm range of this gauge and the corresponding sender for an M38A1 running 12 volts?
Question By: Ken on Apr 1 2015 12:00 AM
7-9 Full and 130-140 Empty
Answer By: Admin on Apr 2 2015 12:00 AM
Questions: Does this gauge work with the 810284 sending unit?
Question By: Anonymous on Mar 8 2015 12:00 AM
The 810284 is for a 24 volt system. This gauge is for a 12 volt system.
Answer By: Willys Tech on Mar 9 2015 12:00 AM
Questions: what is the three post fuel guage grounded to? just a body ground?
Question By: Anonymous on Nov 10 2014 12:00 AM
It can be. As long as your body is grounded to the frame.
Answer By: Willys Tech on Nov 11 2014 12:00 AM
Questions: my new fuel gauge reads only 1/2 full when the tank is actually full. The float seems to be functioning properly. Is there an adjustment procedure?
Question By: Anonymous on Oct 10 2014 12:00 AM
Usually there is a window on the back of the gauge with an adjustment.
Answer By: Willys Tech on Oct 10 2014 12:00 AM
Questions: My fuel gauge was only working part of the time and is now not working at all. When it was working the needle would go back and forth from empty to full. Is there something wrong with my fuel gauge or my fuel sending unit or something else?
Question By: Nick on Apr 20 2014 12:00 AM
It could be either. I would also check your ground as well.
Answer By: Willys Tech on Apr 21 2014 12:00 AM
Questions: Does this work with the sender unit you are offering, A1292-12V ? Also, what was the ring color of the original GPWs? (I have a '42 GPW and the current rings on the gages are black and chrome -- I assume they were either black or OD)
Question By: Sean on Sep 15 2013 12:00 AM
Yes this will work with that sender. If you have a MB or GPW I would use part number: A8184-12
Answer By: Willys Tech on Sep 16 2013 12:00 AM
Questions: i have 47 cj2a with original fuel gauge which i think was 6 volt system. the system is 12volt now will the original gauge work in 12 volt system. i saw in the parts for this model a 12 volt gauge do i need 12 volt gauge
Question By: garry on Feb 28 2013 12:00 AM
Yes you will need this gauge if you are 12 volt. Your original 6 volt one in the dash wont work.
Answer By: Willys Tech on Mar 4 2013 12:00 AM
Questions: I would like to install lighted gauges in my cj-3a if i go with a new fuel gauge is the resistance 10-180 ohms correct on your new sending units jeep is 12 volt now
Question By: texaco on Oct 14 2012 12:00 AM
If you want lighted gauges you need part number: 640284 just like original.
Answer By: Willys Tech on Oct 15 2012 12:00 AM
Questions: Does this 12v fuel gauge read accurately with the 640694 fuel sender?
Question By: Anonymous on Oct 1 2012 12:00 AM
Yes that is correct. They are made together.
Answer By: Willys Tech on Oct 1 2012 12:00 AM
Questions: how do I tell the voltage of my jeep I my dad has a 1952 cj3a and he bought a new fuel gauge but it crapped out. I need to buy a new one since I am driving the jeep to school everyday and I want to do it for my dad as a suprise.
Question By: Anonymous on Aug 4 2012 12:00 AM
I would take a look at the coil, voltage regulator, or battery. They will be stamped.
Answer By: Willys Tech on Aug 6 2012 12:00 AM
Questions: I maintain the '46 CJ2A as a 6 volt system (Using an 8 volt battery). How do I get a 6 volt fuel gage?
Question By: Chuck Coleman on Oct 23 2011 12:00 AM
You want to order part number: 640763
Answer By: Willys Tech on Oct 24 2011 12:00 AM