data89
Newbie
Posts: 10
Reg: 01-22-23
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01-26-23 03:39 PM - Post#2853789
Regarding the 2 fuel gauge tabs on the fuse panel. The top tab has no power. The bottom tab has power. Shouldn't the top tab also have power with the ignition switch on?
The wires going into the ignition switch all have power.
All fuses checked and have power on every one.
Is the no power on the top tab problem in the fuse panel connection inside?
I'm trying to figure out why my fuel gauge doesn't work (it did before switching the printed circuit cluster).
In the diagrams, I see that the fuel gauge wire is connected to the top tab.
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bobb
Super Senior Member
Posts: 6686
Loc: paradise
Reg: 09-05-03
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01-29-23 01:10 PM - Post#2853882
In response to data89
welcome to ct. without pics its hard to say. if the top tab should have power you need to find out why it dosent.
| 70 L camino, grampa engine, g-force 5 spd, road rage suspension. Pray first before all else fails. |
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data89
Newbie
Posts: 10
Reg: 01-22-23
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02-01-23 08:44 AM - Post#2853997
In response to bobb
I checked voltage and resistance. It appears that the tan wire from the tank goes behind and inside the fusebox to the top tab. Resistance on the wire disconnected is approximately 1.2K ohms (I'm assuming that's the resistance of the wire).
With that wire at the tab and from the tank disconnected I have 12V ign on.
From the tab to ground, ign on or off, I have 0V.
Conclusion now is that I have to pull the instrument panel off (under the dash the only 2 wires that are tan are the radio and the dome light) and follow the wires from the cluster plug.
data89 is online now Report Post Edit/Delete Message
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doubleE
Valued Contributor
Posts: 3934
Loc: Eagan MN
Reg: 06-02-03
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02-02-23 05:13 PM - Post#2854070
In response to data89
Your post did not state what your vehicle is so assume it's a 67-72 truck. After reading what's been done - would suspect the ribbon connector on the back of the instrument cluster. Unplug it (might have to remove the cluster from the dash) and clean the contacts on the mylar ribbon using some rubbing alcohol. Re insert the ribbon into the cluster connector.
I had my amp (battery) gauge act flaky and doing this fixed it.
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data89
Newbie
Posts: 10
Reg: 01-22-23
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03-21-23 05:58 PM - Post#2856007
In response to doubleE
Ribbon cluster circuit is brand new. Waiting for warmer weather now to work in the garage (40F).
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data89
Newbie
Posts: 10
Reg: 01-22-23
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06-12-23 08:07 AM - Post#2859106
In response to data89
Ribbon cluster circuit is brand new. Waiting for warmer weather now to work in the garage (40F).
In case anyone wants to know the end of the story...during the troubleshooting process the 3 amp fuse had blown, and 2nd the sending unit wire was not connected to the fuel tab on the fuse box. All fixed now.
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 rcr3
Site Ambassador -"20th Year" Gold Supporting Member
Posts: 3995
Age: 72
Loc: MANHEIM PA. U.S.A.
Reg: 11-24-02
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06-12-23 09:43 AM - Post#2859116
In response to data89
Thanks for the update,always appreciated!
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