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| | | | Joined: Nov 2013 Posts: 38 Wrench Fetcher | | Wrench Fetcher Joined: Nov 2013 Posts: 38 | I bought one of those 6 volt to 12 volt resistor thingee for the gas gauge from Classic Parts. It is spliced into the hot wire going to the gas gauge. No matter how I connect wires the gauge always reads to the full mark when the ignition is turned on. What did I do wrong????? ken | | | | | Joined: Sep 2001 Posts: 29,269 Bubba - Curmudgeon | | Bubba - Curmudgeon Joined: Sep 2001 Posts: 29,269 |
Something is not grounded.
Try running a wire from a clean/good ground to a sender attachment "screw" at the tank (to see if a ground is the problem). I sometimes run a "test" wire from a sender attachment screw all the way back to the ground terminal on your battery (negative terminal for a Chevrolet; positive terminal for a GMC).
| | | | | Joined: Nov 2013 Posts: 38 Wrench Fetcher | | Wrench Fetcher Joined: Nov 2013 Posts: 38 | tcelderman, That did not change anything. I ran a wire from one of the attachment screws directly to the frame. Ground a shiny place on the frame to get good contact. Still, when the key is turned on it registered "FULL". Any more ideas???? The taken has about 7 gallons in it. Its a 48 with the tank under the bed. | | | | | Joined: Sep 2001 Posts: 29,269 Bubba - Curmudgeon | | Bubba - Curmudgeon Joined: Sep 2001 Posts: 29,269 |
I am a simple-minded numbskull when in comes to diagnosing gas gauges.
Run a wire from the sender post on the gas dash-gauge to the sender wire post on sender unit on the gas tank.
If you still read full, my guess would be a bad fuel gauge.
| | | | | Joined: Mar 2010 Posts: 10,275 Renaissance Man | | Renaissance Man Joined: Mar 2010 Posts: 10,275 | Did you happen repaint the backside of the gauge cluster housing? You need some clean, shiny metal where the gas gauge touches the housing.
Carl
1952 5-window - return to "as built" condition | 1950 3100 with a 235 and a T-5 transmission
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