Fuel gauge issue

[shortbed70]

Thank you. It worked fine until one of my airride switches broke and grounded out. Now it just stays full but goes to empty when you turn the truck off. I know it’s getting voltage and all the sending unit stuff is fairly new. How did you ground your cluster? Maybe I’ll try that.

[Ken Cook]

Originally Posted by shortbed70

Thank you. It worked fine until one of my airride switches broke and grounded out. Now it just stays full but goes to empty when you turn the truck off. I know it’s getting voltage and all the sending unit stuff is fairly new. How did you ground your cluster? Maybe I’ll try that.

Use a crimp eye and attach it to the cluster. Any of the screws will work. Then I spliced in to the ground wire to my cigarette lighter. I put a male/female in the middle so I can disconnect it when I need to pull the cluster out.

Did your air ride go all the way down?? If so maybe you have a pinched wire or cut wire going to the tank. You could test that by running a wire straight from the fuel gauge to the tank. Disconnect the wire at the gauge and tank first. Run the test wire right out the door and over the bed. Connect it to the tank and gauge. If that makes it work then fine the bad spot in the wire.

If you check the gauge like I described in my last post and find that the gauge shows FULL when grounded then the wire is touching the frame somewhere between the gauge and tank. If it shows Full without jumpering to ground then your wire is cut.

You can call me if you want. I may be more helpful on the phone than with the keyboard. 337-302-2118 Ken

[Captainfab]

I would suggest checking the wire from the sending unit in the tank all the way to where it plugs into the fuse box. That is assuming you have an original fuse box.

[shortbed70]

Originally Posted by Captainfab

I would suggest checking the wire from the sending unit in the tank all the way to where it plugs into the fuse box. That is assuming you have an original fuse box.

It’s a 21 circuit autowire box and local rear mounted tank. Everything looks good with the wiring so need to check the gauge.