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| | | | Joined: Jan 2010 Posts: 33 New Guy | | New Guy Joined: Jan 2010 Posts: 33 | My '53 1/2 Ton's 6v fuel gauge appears to be working properly- but a few days ago I noticed that even after I remove the key it just stays on. It just reads whatever the gas level is. I disconnect the battery if I leave it overnight.
Any ideas on what could've happened?
Or is this normal and I've just been blind for the three years Ive been driving it??
Last edited by JFG; 10/03/2012 5:48 PM.
| | | | | Joined: Sep 2001 Posts: 29,270 Bubba - Curmudgeon | | Bubba - Curmudgeon Joined: Sep 2001 Posts: 29,270 | What is the input line to the gauge connected to?
| | | | | Joined: Jan 2010 Posts: 33 New Guy | | New Guy Joined: Jan 2010 Posts: 33 | Fuel tank sender I think. It's been there (a new wire) for three years.
Again, it appears that the gauge is working-
It just won't shut off with the ignition.
Last edited by JFG; 10/03/2012 7:38 PM.
| | | | | Joined: Sep 2001 Posts: 29,270 Bubba - Curmudgeon | | Bubba - Curmudgeon Joined: Sep 2001 Posts: 29,270 | The input line is the power-in line.
1. Where is the power coming from?
2. Which post is power-in connected to on the back of the gauge (the post behind Empty of Full).
| | | | | Joined: Jan 2010 Posts: 33 New Guy | | New Guy Joined: Jan 2010 Posts: 33 | Gauge power is in to the post with the reg tag. PROGRESS! I completely disconnected the ignition switch and the gauge problem disappeared. I suspect one of the wires was miswired at the ign sw- I had to re-connect it during a dark rainstorm a few weeks back. Or the switch is bad. Anyway, I have another switch and will connect that one up. I think I have it figured out - as long as I can get the leads connected to the correct ign sw posts!  Thanks!
Last edited by JFG; 10/03/2012 11:09 PM.
| | | | | Joined: Jun 2009 Posts: 1,596 'Bolter | | 'Bolter Joined: Jun 2009 Posts: 1,596 | It sounds like it's just on constant power, not switched. Sounds like you reconnected it to the wrong post on the switch. | | | | | Joined: Mar 2011 Posts: 940 'Bolter | | 'Bolter Joined: Mar 2011 Posts: 940 | So is it supposed to read empty when the truck is off? Mine (6v repop gauge/new main harness) drops a little when the truck is off and returns to the proper reading when back on but it never drops all the way to empty. I also disconnect the battery when I leave it over night or longer and I've never noticed it behaving differently. | | | | | Joined: Jun 2009 Posts: 1,596 'Bolter | | 'Bolter Joined: Jun 2009 Posts: 1,596 | No, fuel gauges never read empty when off (unless it's on a newer vehicle with electric stepper motors in the gauges), they typically just go to the same point in the gauge, but each one is different. | | | | | Joined: Mar 2011 Posts: 940 'Bolter | | 'Bolter Joined: Mar 2011 Posts: 940 | Cool. Thanks for clarifying 44gmcpu! | | |
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