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03-18-2015, 12:47 PM
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#1 |
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Registered User
Join Date: Mar 2015
Location: Oakland
Posts: 2
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Fuel Gauge Issues?
Hey guys, this is my first post but I have a 1974 c10 with a 350/350. I am having issues with the fuel gauge, and I noticed it has no wires or anything behind it. There's supposed to be wiring of some sort there, correct? Anyways thank you in advance.
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03-18-2015, 01:55 PM
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#2 |
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Registered User
Join Date: Sep 2014
Location: Texas
Posts: 215
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Re: Fuel Gauge Issues?
You are correct, the wiring is in the form of a curcuit board that the fuel guage plugs into. A wiring harness connector plugs into the curcuit board from the front of the insturment panel. What sort of issues are you having?
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03-26-2015, 12:16 PM
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#3 |
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Registered User
Join Date: Mar 2015
Location: Oakland
Posts: 2
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Re: Fuel Gauge Issues?
The fuel gauge just seems to flop around when I drive, it'll just kind of move in whatever direction the cars moving haha
 it's got a printed circuit board but nothing else, and it looks like nothing really is holding it so I don't think it's being powered
__________________
_____________________________________________ -74 C10 Custom Deluxe 350/350 "Jorunn" “Speed has never killed anyone, suddenly becoming stationary… that’s what gets you.” ― Jeremy Clarkson |
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03-26-2015, 01:31 PM
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#4 |
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Registered User
Join Date: Sep 2014
Location: Texas
Posts: 215
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Re: Fuel Gauge Issues?
I sounds like the fuel gauge might be faulty. Do you have any other gauge problems? Do the dash lights work? If it were a sending unit or wiring problem I don't think it would just flop around. Have you had the guage itself out?
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03-26-2015, 10:02 PM
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#5 |
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Moderator
 
Join Date: Oct 2008
Location: Wentworth, NH
Posts: 4,977
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Re: Fuel Gauge Issues?
The swinging needle can be a loose instrument cluster ground or cluster power splice.
If you search around the board you'll find pictures posted by Motornut that show the Instrument Cluster harness wire tape unwound to expose the splices.
__________________
1959 M35A2 LDT465-1D SOLD 1967 Dodge W200 B383, NP420/NP201 SOLD 1969 Dodge Polara 500 B383, A833 SOLD 1972 Ford F250 FE390, NP435/NP205 SOLD 1976 Chevy K20, 6.5L, NV4500/NP208 SOLD 1986 M1008 CUCV SOLD 2000 GMC C2500, TD6.5L, NV4500 2005 Chevy Silverado LS 2500HD 6.0L 4L80E/NP263 2009 Impala SS LS4 V8 RTFM... GM Parts Books, GM Schematics, GM service manuals, and GM training materials...
And please let us know if and how your repairs were successful. |
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03-26-2015, 11:33 PM
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#6 |
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78K & 79C Jimmys
Join Date: Nov 2009
Location: Ottawa Ont CANADA
Posts: 7,901
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Re: Fuel Gauge Issues?
Yes sometimes the plug or board gets loose.
sometimes the path on the board lifts off the mylar plastic but the joins are about a foot from the plug
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John 1978 GMCJimmy4X4-350/203 1979 GMCJimmy4X2-305/350 |
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