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**The Rocknrod** · 04-01-2021, 08:44 PM

From another post of vettevette - "To test the gauge you should first use an ohmmeter and read between the two posts looking for 40 or so ohms. Then run a positive 12 volt wire to the plus side of the gauge and then a ground to the negative side and you should get empty. You have to be sure the gauge body and the cluster are grounded as well. I can't tell from the pictures what is on the circuit board.

Here are the resistance values of the gauges on the 67/72 trucks."
Except I have a 64.
So tomorrow I will try this. and post what ohms I get.

04-01-2021, 08:44 PM	#8
The Rocknrod Moderator Join Date: Aug 2011 Location: China Spring, TX Posts: 7,280	Re: Fuel Gauge at Full From another post of vettevette - "To test the gauge you should first use an ohmmeter and read between the two posts looking for 40 or so ohms. Then run a positive 12 volt wire to the plus side of the gauge and then a ground to the negative side and you should get empty. You have to be sure the gauge body and the cluster are grounded as well. I can't tell from the pictures what is on the circuit board. Here are the resistance values of the gauges on the 67/72 trucks." Except I have a 64. So tomorrow I will try this. and post what ohms I get. __________________ Master Chief, US Navy, Retired 1964 C10 Step-side Short Bed - In Progress 2009 2500HD Duramax LTZ 1948 GMC Panel 1956 Big Window Stepside 1953 5 Window Chevy Stepside 1932 Coupe New Seat Foam for Bench Seats?